HOME

TheInfoList



OR:

The Islamic Golden Age was a period of cultural, economic, and scientific flourishing in the
history of Islam The history of Islam concerns the political, social, economic, military, and cultural developments of the Islamic civilization. Most historians believe that Islam originated in Mecca and Medina at the start of the 7th century CE. Muslims r ...
, traditionally dated from the 8th century to the 14th century. This period is traditionally understood to have begun during the reign of the
Abbasid The Abbasid Caliphate ( or ; ar, الْخِلَافَةُ الْعَبَّاسِيَّة, ') was the third caliphate to succeed the Islamic prophet Muhammad. It was founded by a dynasty descended from Muhammad's uncle, Abbas ibn Abdul-Muttalib ...
caliph
Harun al-Rashid Abu Ja'far Harun ibn Muhammad al-Mahdi ( ar , أبو جعفر هارون ابن محمد المهدي) or Harun ibn al-Mahdi (; or 766 – 24 March 809), famously known as Harun al-Rashid ( ar, هَارُون الرَشِيد, translit=Hārūn ...
(786 to 809) with the inauguration of the
House of Wisdom The House of Wisdom ( ar, بيت الحكمة, Bayt al-Ḥikmah), also known as the Grand Library of Baghdad, refers to either a major Abbasid public academy and intellectual center in Baghdad or to a large private library belonging to the Abba ...
in
Baghdad Baghdad (; ar, بَغْدَاد , ) is the capital of Iraq and the second-largest city in the Arab world after Cairo. It is located on the Tigris near the ruins of the ancient city of Babylon and the Sassanid Persian capital of Ctesiphon ...
, the world's largest city by then, where Muslim
scholars A scholar is a person who pursues academic and intellectual activities, particularly academics who apply their intellectualism into expertise in an area of study. A scholar can also be an academic, who works as a professor, teacher, or researcher ...
and
polymath A polymath ( el, πολυμαθής, , "having learned much"; la, homo universalis, "universal human") is an individual whose knowledge spans a substantial number of subjects, known to draw on complex bodies of knowledge to solve specific pro ...
s from various parts of the world with different cultural backgrounds were mandated to gather and translate all of the known world's classical knowledge into
Aramaic The Aramaic languages, short Aramaic ( syc, ܐܪܡܝܐ, Arāmāyā; oar, 𐤀𐤓𐤌𐤉𐤀; arc, 𐡀𐡓𐡌𐡉𐡀; tmr, אֲרָמִית), are a language family containing many varieties (languages and dialects) that originated in ...
and
Arabic Arabic (, ' ; , ' or ) is a Semitic languages, Semitic language spoken primarily across the Arab world.Semitic languages: an international handbook / edited by Stefan Weninger; in collaboration with Geoffrey Khan, Michael P. Streck, Janet C ...
. The period is traditionally said to have ended with the collapse of the Abbasid caliphate due to
Mongol invasions The Mongol invasions and conquests took place during the 13th and 14th centuries, creating history's largest contiguous empire: the Mongol Empire ( 1206- 1368), which by 1300 covered large parts of Eurasia. Historians regard the Mongol devastati ...
and the Siege of Baghdad in 1258. A few scholars date the end of the golden age around 1350 linking with the
Timurid Renaissance The Timurid Renaissance was a historical period in Asian and Islamic history spanning the late 14th, the 15th, and the early 16th centuries. Following the gradual downturn of the Islamic Golden Age, the Timurid Empire, based in Central Asia rule ...
, while several modern historians and scholars place the end of the Islamic Golden Age as late as the end of 15th to 16th centuries meeting with the Islamic
gunpowder empires The gunpowder empires, or Islamic gunpowder empires, is a collective term coined by Marshall G. S. Hodgson and William H. McNeill at the University of Chicago, referring to three Muslim empires: the Ottoman Empire, Safavid Empire and the Mugha ...
. The medieval period of Islam drew over a similar if not identical period, with one source defining it as 900–1300 CE.


History of the concepts

The metaphor of a
golden age The term Golden Age comes from Greek mythology, particularly the ''Works and Days'' of Hesiod, and is part of the description of temporal decline of the state of peoples through five Ages of Man, Ages, Gold being the first and the one during ...
began to be applied in 19th-century literature about
Islamic history The history of Islam concerns the political, social, economic, military, and cultural developments of the Islamic civilization. Most historians believe that Islam originated in Mecca and Medina at the start of the 7th century CE. Muslims r ...
, in the context of the western aesthetic fashion known as
Orientalism In art history, literature and cultural studies, Orientalism is the imitation or depiction of aspects in the Eastern world. These depictions are usually done by writers, designers, and artists from the Western world. In particular, Orientalist p ...
. The author of a ''Handbook for Travelers in Syria and Palestine'' in 1868 observed that the most beautiful mosques of
Damascus )), is an adjective which means "spacious". , motto = , image_flag = Flag of Damascus.svg , image_seal = Emblem of Damascus.svg , seal_type = Seal , map_caption = , ...
were "like Mohammedanism itself, now rapidly decaying" and relics of "the golden age of Islam". There is no unambiguous definition of the term, and depending on whether it is used with a focus on cultural or on military achievement, it may be taken to refer to rather disparate time spans. Thus, one 19th century author would have it extend to the duration of the caliphate, or to "six and a half centuries", while another would have it end after only a few decades of Rashidun conquests, with the death of
Umar ʿUmar ibn al-Khaṭṭāb ( ar, عمر بن الخطاب, also spelled Omar, ) was the second Rashidun caliph, ruling from August 634 until his assassination in 644. He succeeded Abu Bakr () as the second caliph of the Rashidun Caliphate o ...
and the
First Fitna The First Fitna ( ar, فتنة مقتل عثمان, fitnat maqtal ʻUthmān, strife/sedition of the killing of Uthman) was the first civil war in the Islamic community. It led to the overthrow of the Rashidun Caliphate and the establishment of ...
. During the early 20th century, the term was used only occasionally and often referred to as the early military successes of the
Rashidun caliphs , image = تخطيط كلمة الخلفاء الراشدون.png , caption = Calligraphic representation of Rashidun Caliphs , birth_place = Mecca, Hejaz, Arabia present-day Saudi Arabia , known_for = Companions of t ...
. It was only in the second half of the 20th century that the term came to be used with any frequency, now mostly referring to the cultural flourishing of science and mathematics under the caliphates during the 9th to 11th centuries (between the establishment of organised scholarship in the
House of Wisdom The House of Wisdom ( ar, بيت الحكمة, Bayt al-Ḥikmah), also known as the Grand Library of Baghdad, refers to either a major Abbasid public academy and intellectual center in Baghdad or to a large private library belonging to the Abba ...
and the beginning of the
crusades The Crusades were a series of religious wars initiated, supported, and sometimes directed by the Latin Church in the medieval period. The best known of these Crusades are those to the Holy Land in the period between 1095 and 1291 that were in ...
), but often extended to include part of the late 8th or the 12th to early 13th centuries. Definitions may still vary considerably. Equating the end of the golden age with the end of the caliphates is a convenient cut-off point based on a historical landmark, but it can be argued that Islamic culture had entered a gradual decline much earlier; thus, Khan (2003) identifies the proper golden age as being the two centuries between 750 and 950, arguing that the beginning loss of territories under Harun al-Rashid worsened after the death of
al-Ma'mun Abu al-Abbas Abdallah ibn Harun al-Rashid ( ar, أبو العباس عبد الله بن هارون الرشيد, Abū al-ʿAbbās ʿAbd Allāh ibn Hārūn ar-Rashīd; 14 September 786 – 9 August 833), better known by his regnal name Al-Ma'mu ...
in 833, and that the
crusades The Crusades were a series of religious wars initiated, supported, and sometimes directed by the Latin Church in the medieval period. The best known of these Crusades are those to the Holy Land in the period between 1095 and 1291 that were in ...
in the 12th century resulted in a weakening of the
Islamic empire This article includes a list of successive Islamic states and Muslim dynasties beginning with the time of the Islamic prophet Muhammad (570–632 CE) and the early Muslim conquests that spread Islam outside of the Arabian Peninsula, and continuin ...
from which it never recovered.


Causes


Religious influence

The various
Quran The Quran (, ; Standard Arabic: , Classical Arabic, Quranic Arabic: , , 'the recitation'), also romanized Qur'an or Koran, is the central religious text of Islam, believed by Muslims to be a revelation in Islam, revelation from God in Islam, ...
ic injunctions and
Hadith Ḥadīth ( or ; ar, حديث, , , , , , , literally "talk" or "discourse") or Athar ( ar, أثر, , literally "remnant"/"effect") refers to what the majority of Muslims believe to be a record of the words, actions, and the silent approval ...
(or actions of
Muhammad Muhammad ( ar, مُحَمَّد;  570 – 8 June 632 Common Era, CE) was an Arab religious, social, and political leader and the founder of Islam. According to Muhammad in Islam, Islamic doctrine, he was a prophet Divine inspiration, di ...
), which place values on education and emphasize the importance of acquiring knowledge, played a vital role in influencing the Muslims of this age in their search for knowledge and the development of the body of science.


Government sponsorship

The
Islamic Empire This article includes a list of successive Islamic states and Muslim dynasties beginning with the time of the Islamic prophet Muhammad (570–632 CE) and the early Muslim conquests that spread Islam outside of the Arabian Peninsula, and continuin ...
heavily patronized scholars. The money spent on the Translation Movement for some translations is estimated to be equivalent to about twice the annual research budget of the United Kingdom's Medical Research Council. The best scholars and notable translators, such as
Hunayn ibn Ishaq Hunayn ibn Ishaq al-Ibadi (also Hunain or Hunein) ( ar, أبو زيد حنين بن إسحاق العبادي; (809–873) was an influential Nestorian Christian translator, scholar, physician, and scientist. During the apex of the Islamic ...
, had salaries that are estimated to be the equivalent of professional athletes today. The
House of Wisdom The House of Wisdom ( ar, بيت الحكمة, Bayt al-Ḥikmah), also known as the Grand Library of Baghdad, refers to either a major Abbasid public academy and intellectual center in Baghdad or to a large private library belonging to the Abba ...
was a
library A library is a collection of materials, books or media that are accessible for use and not just for display purposes. A library provides physical (hard copies) or digital access (soft copies) materials, and may be a physical location or a vir ...
established in
Abbasid The Abbasid Caliphate ( or ; ar, الْخِلَافَةُ الْعَبَّاسِيَّة, ') was the third caliphate to succeed the Islamic prophet Muhammad. It was founded by a dynasty descended from Muhammad's uncle, Abbas ibn Abdul-Muttalib ...
-era
Baghdad Baghdad (; ar, بَغْدَاد , ) is the capital of Iraq and the second-largest city in the Arab world after Cairo. It is located on the Tigris near the ruins of the ancient city of Babylon and the Sassanid Persian capital of Ctesiphon ...
,
Iraq Iraq,; ku, عێراق, translit=Êraq officially the Republic of Iraq, '; ku, کۆماری عێراق, translit=Komarî Êraq is a country in Western Asia. It is bordered by Turkey to Iraq–Turkey border, the north, Iran to Iran–Iraq ...
by Caliph
al-Mansur Abū Jaʿfar ʿAbd Allāh ibn Muḥammad al-Manṣūr (; ar, أبو جعفر عبد الله بن محمد المنصور‎; 95 AH – 158 AH/714 CE – 6 October 775 CE) usually known simply as by his laqab Al-Manṣūr (المنصور) w ...
in 825 modeled after the academy of Jundishapur.


Openness to diverse influences

During this period, the Muslims showed a strong interest in assimilating the scientific knowledge of the civilizations that had been conquered. Many classic works of antiquity that might otherwise have been lost were translated from
Greek Greek may refer to: Greece Anything of, from, or related to Greece, a country in Southern Europe: *Greeks, an ethnic group. *Greek language, a branch of the Indo-European language family. **Proto-Greek language, the assumed last common ancestor ...
,
Syriac Syriac may refer to: *Syriac language, an ancient dialect of Middle Aramaic *Sureth, one of the modern dialects of Syriac spoken in the Nineveh Plains region * Syriac alphabet ** Syriac (Unicode block) ** Syriac Supplement * Neo-Aramaic languages a ...
,
Middle Persian Middle Persian or Pahlavi, also known by its endonym Pārsīk or Pārsīg () in its later form, is a Western Middle Iranian language which became the literary language of the Sasanian Empire. For some time after the Sasanian collapse, Middle Per ...
, and
Sanskrit Sanskrit (; attributively , ; nominally , , ) is a classical language belonging to the Indo-Aryan branch of the Indo-European languages. It arose in South Asia after its predecessor languages had diffused there from the northwest in the late ...
into Syriac and Arabic, some of which were later in turn translated into other languages like
Hebrew Hebrew (; ; ) is a Northwest Semitic language of the Afroasiatic language family. Historically, it is one of the spoken languages of the Israelites and their longest-surviving descendants, the Jews and Samaritans. It was largely preserved ...
and
Latin Latin (, or , ) is a classical language belonging to the Italic branch of the Indo-European languages. Latin was originally a dialect spoken in the lower Tiber area (then known as Latium) around present-day Rome, but through the power of the ...
.
Christians Christians () are people who follow or adhere to Christianity, a monotheistic Abrahamic religion based on the life and teachings of Jesus Christ. The words ''Christ'' and ''Christian'' derive from the Koine Greek title ''Christós'' (Χρι ...
, especially the adherents of the
Church of the East The Church of the East ( syc, ܥܕܬܐ ܕܡܕܢܚܐ, ''ʿĒḏtā d-Maḏenḥā'') or the East Syriac Church, also called the Church of Seleucia-Ctesiphon, the Persian Church, the Assyrian Church, the Babylonian Church or the Nestorian C ...
(
Nestorian Nestorianism is a term used in Christian theology and Church history to refer to several mutually related but doctrinarily distinct sets of teachings. The first meaning of the term is related to the original teachings of Christian theologian N ...
s), contributed to Islamic civilization during the reign of the
Umayyads Umayyads may refer to: *Umayyad dynasty, a Muslim ruling family of the Caliphate (661–750) and in Spain (756–1031) *Umayyad Caliphate (661–750) :*Emirate of Córdoba (756–929) :*Caliphate of Córdoba The Caliphate of Córdoba ( ar, خ ...
and the
Abbasids The Abbasid Caliphate ( or ; ar, الْخِلَافَةُ الْعَبَّاسِيَّة, ') was the third caliphate to succeed the Islamic prophet Muhammad. It was founded by a dynasty descended from Muhammad's uncle, Abbas ibn Abdul-Muttalib ...
by translating works of
Greek philosophers Ancient Greek philosophy arose in the 6th century BC, marking the end of the Greek Dark Ages. Greek philosophy continued throughout the Hellenistic period and the period in which Greece and most Greek-inhabited lands were part of the Roman Empire ...
and
ancient science The history of science in early cultures covers protoscience in ancient history to Islamic Science. In these times, advice and knowledge was passed from generation to generation in an oral tradition. The development of writing enabled knowledge to ...
to
Syriac Syriac may refer to: *Syriac language, an ancient dialect of Middle Aramaic *Sureth, one of the modern dialects of Syriac spoken in the Nineveh Plains region * Syriac alphabet ** Syriac (Unicode block) ** Syriac Supplement * Neo-Aramaic languages a ...
and afterwards to
Arabic Arabic (, ' ; , ' or ) is a Semitic languages, Semitic language spoken primarily across the Arab world.Semitic languages: an international handbook / edited by Stefan Weninger; in collaboration with Geoffrey Khan, Michael P. Streck, Janet C ...
. They also excelled in many fields, in particular
philosophy Philosophy (from , ) is the systematized study of general and fundamental questions, such as those about existence, reason, knowledge, values, mind, and language. Such questions are often posed as problems to be studied or resolved. Some ...
,
science Science is a systematic endeavor that builds and organizes knowledge in the form of testable explanations and predictions about the universe. Science may be as old as the human species, and some of the earliest archeological evidence for ...
(such as
Hunayn ibn Ishaq Hunayn ibn Ishaq al-Ibadi (also Hunain or Hunein) ( ar, أبو زيد حنين بن إسحاق العبادي; (809–873) was an influential Nestorian Christian translator, scholar, physician, and scientist. During the apex of the Islamic ...
, Yusuf Al-Khuri, Al Himsi,
Qusta ibn Luqa Qusta ibn Luqa (820–912) (Costa ben Luca, Constabulus) was a Syrian Melkite Christian physician, philosopher, astronomer, mathematician and translator. He was born in Baalbek. Travelling to parts of the Byzantine Empire, he brought back Greek te ...
,
Masawaiyh Yuhanna ibn Masawaih (circa 777–857), ( ar, يوحنا بن ماسويه), also written Ibn Masawaih, Masawaiyh, and in Latin Janus Damascenus, or Mesue, Masuya, Mesue Major, Msuya, and Mesuë the Elder was a Persian people, Persian or Assyria ...
, Patriarch Eutychius, and
Jabril ibn Bukhtishu Jabril ibn Bukhtishu, (Jibril ibn Bakhtisha) also written as Bakhtyshu, was an 8th-9th century physician from the Bukhtishu family of Assyrian Nestorian physicians from the Academy of Gundishapur. He was a Nestorian and spoke the Syriac language. ...
) and
theology Theology is the systematic study of the nature of the divine and, more broadly, of religious belief. It is taught as an academic discipline, typically in universities and seminaries. It occupies itself with the unique content of analyzing the ...
. For a long period of time the personal
physicians A physician (American English), medical practitioner (Commonwealth English), medical doctor, or simply doctor, is a health professional who practices medicine, which is concerned with promoting, maintaining or restoring health through th ...
of the Abbasid Caliphs were often
Assyrian Assyrian may refer to: * Assyrian people, the indigenous ethnic group of Mesopotamia. * Assyria, a major Mesopotamian kingdom and empire. ** Early Assyrian Period ** Old Assyrian Period ** Middle Assyrian Empire ** Neo-Assyrian Empire * Assyrian ...
Christians Christians () are people who follow or adhere to Christianity, a monotheistic Abrahamic religion based on the life and teachings of Jesus Christ. The words ''Christ'' and ''Christian'' derive from the Koine Greek title ''Christós'' (Χρι ...
. Among the most prominent Christian families to serve as physicians to the caliphs were the
Bukhtishu The Bukhtīshūʿ (or Boḵtīšūʿ) were a family of either Persian or Nestorian Christian physicians from the 7th, 8th, and 9th centuries, spanning six generations and 250 years. The Middle Persian-Syriac name which can be found as early as at ...
dynasty. Throughout the 4th to 7th centuries,
Christian Christians () are people who follow or adhere to Christianity, a monotheistic Abrahamic religion based on the life and teachings of Jesus Christ. The words ''Christ'' and ''Christian'' derive from the Koine Greek title ''Christós'' (Χρι ...
scholarly work in the Greek and Syriac languages was either newly translated or had been preserved since the Hellenistic period. Among the prominent centers of learning and transmission of classical wisdom were Christian colleges such as the
School of Nisibis The School of Nisibis ( syr, ܐܣܟܘܠܐ ܕܢܨܝܒܝܢ, for a time absorbed into the School of Edessa) was an educational establishment in Nisibis (now Nusaybin, Turkey). It was an important spiritual centre of the early Church of the East, and ...
and the
School of Edessa The School of Edessa ( syr, ܐܣܟܘܠܐ ܕܐܘܪܗܝ) was a Christian theological school of great importance to the Syriac-speaking world. It had been founded as long ago as the 2nd century by the kings of the Abgar dynasty. In 363, Nisibis fell t ...
,The School of Edessa
, Nestorian.org.
the pagan center of learning in
Harran Harran (), historically known as Carrhae ( el, Kάρραι, Kárrhai), is a rural town and district of the Şanlıurfa Province in southeastern Turkey, approximately 40 kilometres (25 miles) southeast of Urfa and 20 kilometers from the border cr ...
, and the renowned
hospital A hospital is a health care institution providing patient treatment with specialized health science and auxiliary healthcare staff and medical equipment. The best-known type of hospital is the general hospital, which typically has an emerge ...
and medical Academy of Gondishapur, which was the intellectual, theological and scientific center of the Church of the East. Many scholars of the House of Wisdom were of Christian background and it was led by Christian physician
Hunayn ibn Ishaq Hunayn ibn Ishaq al-Ibadi (also Hunain or Hunein) ( ar, أبو زيد حنين بن إسحاق العبادي; (809–873) was an influential Nestorian Christian translator, scholar, physician, and scientist. During the apex of the Islamic ...
, with the support of
Byzantine medicine Byzantine medicine encompasses the common medical practices of the Byzantine Empire from c. 400 AD to 1453 AD. Byzantine medicine was notable for building upon the knowledge base developed by its Greco-Roman predecessors. In preserving medical pr ...
. Many of the most important philosophical and scientific works of the ancient world were translated, including the work of
Galen Aelius Galenus or Claudius Galenus ( el, Κλαύδιος Γαληνός; September 129 – c. AD 216), often Anglicized as Galen () or Galen of Pergamon, was a Greek physician, surgeon and philosopher in the Roman Empire. Considered to be one of ...
,
Hippocrates Hippocrates of Kos (; grc-gre, Ἱπποκράτης ὁ Κῷος, Hippokrátēs ho Kôios; ), also known as Hippocrates II, was a Greek physician of the classical period who is considered one of the most outstanding figures in the history of ...
,
Plato Plato ( ; grc-gre, Πλάτων ; 428/427 or 424/423 – 348/347 BC) was a Greek philosopher born in Athens during the Classical period in Ancient Greece. He founded the Platonist school of thought and the Academy, the first institution ...
,
Aristotle Aristotle (; grc-gre, Ἀριστοτέλης ''Aristotélēs'', ; 384–322 BC) was a Greek philosopher and polymath during the Classical period in Ancient Greece. Taught by Plato, he was the founder of the Peripatetic school of phil ...
,
Ptolemy Claudius Ptolemy (; grc-gre, Πτολεμαῖος, ; la, Claudius Ptolemaeus; AD) was a mathematician, astronomer, astrologer, geographer, and music theorist, who wrote about a dozen scientific treatises, three of which were of importanc ...
and
Archimedes Archimedes of Syracuse (;; ) was a Greek mathematician, physicist, engineer, astronomer, and inventor from the ancient city of Syracuse in Sicily. Although few details of his life are known, he is regarded as one of the leading scientists ...
.
Persian Persian may refer to: * People and things from Iran, historically called ''Persia'' in the English language ** Persians, the majority ethnic group in Iran, not to be conflated with the Iranic peoples ** Persian language, an Iranian language of the ...
s also were a notably high proportion of
scientists A scientist is a person who conducts scientific research to advance knowledge in an area of the natural sciences. In classical antiquity, there was no real ancient analog of a modern scientist. Instead, philosophers engaged in the philosophica ...
who contributed to the Islamic Golden Age. According to
Bernard Lewis Bernard Lewis, (31 May 1916 – 19 May 2018) was a British American historian specialized in Oriental studies. He was also known as a public intellectual and political commentator. Lewis was the Cleveland E. Dodge Professor Emeritus of Near E ...
: "Culturally, politically, and most remarkable of all even religiously, the Persian contribution to this new Islamic civilization is of immense importance. The work of Iranians can be seen in every field of cultural endeavor, including Arabic poetry, to which poets of Iranian origin composing their poems in Arabic made a very significant contribution." While cultural influence used to radiate outward from Baghdad, after the Mongol destruction of the Abbasid Caliphate, Arab influence decreased. Iran and Central Asia, benefiting from increased cross-cultural access to East Asia under Mongol rule, flourished and developed more distinctively from Arab influence, such as the
Timurid Renaissance The Timurid Renaissance was a historical period in Asian and Islamic history spanning the late 14th, the 15th, and the early 16th centuries. Following the gradual downturn of the Islamic Golden Age, the Timurid Empire, based in Central Asia rule ...
under the
Timurid dynasty The Timurid dynasty ( chg, , fa, ), self-designated as Gurkani ( chg, , translit=Küregen, fa, , translit=Gūrkāniyān), was a Sunni Muslim dynasty or clan of Turco-Mongol originB.F. Manz, ''"Tīmūr Lang"'', in Encyclopaedia of Islam, O ...
.


New technology

With a new and easier
writing system A writing system is a method of visually representing verbal communication, based on a script and a set of rules regulating its use. While both writing and speech are useful in conveying messages, writing differs in also being a reliable form ...
, and the introduction of paper, information was democratized to the extent that, for probably the first time in history, it became possible to make a living from only writing and selling books. The use of paper spread from
China China, officially the People's Republic of China (PRC), is a country in East Asia. It is the world's most populous country, with a population exceeding 1.4 billion, slightly ahead of India. China spans the equivalent of five time zones and ...
into Muslim regions in the eighth century through mass production in
Samarkand fa, سمرقند , native_name_lang = , settlement_type = City , image_skyline = , image_caption = Clockwise from the top:Registan square, Shah-i-Zinda necropolis, Bibi-Khanym Mosque, view inside Shah-i-Zinda, ...
and
Khorasan Khorasan may refer to: * Greater Khorasan, a historical region which lies mostly in modern-day northern/northwestern Afghanistan, northeastern Iran, southern Turkmenistan, Tajikistan, and Uzbekistan * Khorasan Province, a pre-2004 province of Ira ...
, arriving in
Al-Andalus Al-Andalus DIN 31635, translit. ; an, al-Andalus; ast, al-Ándalus; eu, al-Andalus; ber, ⴰⵏⴷⴰⵍⵓⵙ, label=Berber languages, Berber, translit=Andalus; ca, al-Àndalus; gl, al-Andalus; oc, Al Andalús; pt, al-Ândalus; es, ...
on the
Iberian peninsula The Iberian Peninsula (), ** * Aragonese and Occitan: ''Peninsula Iberica'' ** ** * french: Péninsule Ibérique * mwl, Península Eibérica * eu, Iberiar penintsula also known as Iberia, is a peninsula in southwestern Europe, defi ...
(modern Spain and Portugal) in the 10th century. It was easier to manufacture than
parchment Parchment is a writing material made from specially prepared untanned skins of animals—primarily sheep, calves, and goats. It has been used as a writing medium for over two millennia. Vellum is a finer quality parchment made from the skins of ...
, less likely to crack than
papyrus Papyrus ( ) is a material similar to thick paper that was used in ancient times as a writing surface. It was made from the pith of the papyrus plant, '' Cyperus papyrus'', a wetland sedge. ''Papyrus'' (plural: ''papyri'') can also refer to a ...
, and could absorb ink, making it difficult to erase and ideal for keeping records. Islamic paper makers devised assembly-line methods of hand-copying manuscripts to turn out editions far larger than any available in
Europe Europe is a large peninsula conventionally considered a continent in its own right because of its great physical size and the weight of its history and traditions. Europe is also considered a Continent#Subcontinents, subcontinent of Eurasia ...
for centuries. It was from these countries that the rest of the world learned to make paper from linen.


Education

The centrality of scripture and its study in the Islamic tradition helped to make education a central pillar of the religion in virtually all times and places in the history of Islam. The importance of learning in the Islamic tradition is reflected in a number of hadiths attributed to Muhammad, including one that states "Seeking knowledge is obligatory upon every Muslim". This injunction was seen to apply particularly to scholars, but also to some extent to the wider Muslim public, as exemplified by the dictum of
al-Zarnuji Burhan al-Din al-Zarnuji or Burhan al-Islam al-Zarnuji also spelled az-Zarnuji was a Muslim scholar and the author of the celebrated pedagogical work ''Ta'līm al-Muta'allim-Ṭarīq at-Ta'-allum'' (''Instruction of the Student: The Method of Lea ...
, "learning is prescribed for us all". While it is impossible to calculate literacy rates in pre-modern Islamic societies, it is almost certain that they were relatively high, at least in comparison to their European counterparts. Education would begin at a young age with study of
Arabic Arabic (, ' ; , ' or ) is a Semitic languages, Semitic language spoken primarily across the Arab world.Semitic languages: an international handbook / edited by Stefan Weninger; in collaboration with Geoffrey Khan, Michael P. Streck, Janet C ...
and the
Quran The Quran (, ; Standard Arabic: , Classical Arabic, Quranic Arabic: , , 'the recitation'), also romanized Qur'an or Koran, is the central religious text of Islam, believed by Muslims to be a revelation in Islam, revelation from God in Islam, ...
, either at home or in a primary school, which was often attached to a mosque. Some students would then proceed to training in
tafsir Tafsir ( ar, تفسير, tafsīr ) refers to exegesis, usually of the Quran. An author of a ''tafsir'' is a ' ( ar, مُفسّر; plural: ar, مفسّرون, mufassirūn). A Quranic ''tafsir'' attempts to provide elucidation, explanation, in ...
(Quranic exegesis) and
fiqh ''Fiqh'' (; ar, فقه ) is Islamic jurisprudence. Muhammad-> Companions-> Followers-> Fiqh. The commands and prohibitions chosen by God were revealed through the agency of the Prophet in both the Quran and the Sunnah (words, deeds, and ...
(Islamic jurisprudence), which was seen as particularly important. Education focused on memorization, but also trained the more advanced students to participate as readers and writers in the tradition of commentary on the studied texts. It also involved a process of
socialization In sociology, socialization or socialisation (see spelling differences) is the process of internalizing the norms and ideologies of society. Socialization encompasses both learning and teaching and is thus "the means by which social and cultur ...
of aspiring scholars, who came from virtually all social backgrounds, into the ranks of the
ulema In Islam, the ''ulama'' (; ar, علماء ', singular ', "scholar", literally "the learned ones", also spelled ''ulema''; feminine: ''alimah'' ingularand ''aalimath'' lural are the guardians, transmitters, and interpreters of religious ...
. For the first few centuries of Islam, educational settings were entirely informal, but beginning in the 11th and 12th centuries, the ruling elites began to establish institutions of higher religious learning known as
madrasa Madrasa (, also , ; Arabic: مدرسة , pl. , ) is the Arabic word for any type of educational institution, secular or religious (of any religion), whether for elementary instruction or higher learning. The word is variously transliterated '' ...
s in an effort to secure support and cooperation of the ulema. Madrasas soon multiplied throughout the Islamic world, which helped to spread Islamic learning beyond urban centers and to unite diverse Islamic communities in a shared cultural project. Nonetheless, instruction remained focused on individual relationships between students and their teacher. The formal attestation of educational attainment, ''
ijaza An ''ijazah'' ( ar, الإِجازَة, "permission", "authorization", "license"; plural: ''ijazahs'' or ''ijazat'') is a license authorizing its holder to transmit a certain text or subject, which is issued by someone already possessing such au ...
'', was granted by a particular scholar rather than the institution, and it placed its holder within a genealogy of scholars, which was the only recognized hierarchy in the educational system. While formal studies in madrasas were open only to men, women of prominent urban families were commonly educated in private settings and many of them received and later issued ''ijazas'' in hadith studies, calligraphy and poetry recitation. Working women learned religious texts and practical skills primarily from each other, though they also received some instruction together with men in mosques and private homes. Madrasas were devoted principally to study of law, but they also offered other subjects such as theology, medicine, and mathematics. The madrasa complex usually consisted of a mosque, boarding house, and a library. It was maintained by a
waqf A waqf ( ar, وَقْف; ), also known as hubous () or '' mortmain'' property is an inalienable charitable endowment under Islamic law. It typically involves donating a building, plot of land or other assets for Muslim religious or charitabl ...
(charitable endowment), which paid salaries of professors, stipends of students, and defrayed the costs of construction and maintenance. The madrasa was unlike a modern college in that it lacked a standardized curriculum or institutionalized system of certification. Muslims distinguished disciplines inherited from pre-Islamic civilizations, such as philosophy and medicine, which they called "sciences of the ancients" or "rational sciences", from Islamic religious sciences. Sciences of the former type flourished for several centuries, and their transmission formed part of the educational framework in classical and medieval Islam. In some cases, they were supported by institutions such as the
House of Wisdom The House of Wisdom ( ar, بيت الحكمة, Bayt al-Ḥikmah), also known as the Grand Library of Baghdad, refers to either a major Abbasid public academy and intellectual center in Baghdad or to a large private library belonging to the Abba ...
in Baghdad, but more often they were transmitted informally from teacher to student. The University of Al Karaouine, founded in 859 AD, is listed in ''
The Guinness Book Of Records ''Guinness World Records'', known from its inception in 1955 until 1999 as ''The Guinness Book of Records'' and in previous United States editions as ''The Guinness Book of World Records'', is a reference book published annually, listing world ...
'' as the world's oldest degree-granting university. The
Al-Azhar University , image = جامعة_الأزهر_بالقاهرة.jpg , image_size = 250 , caption = Al-Azhar University portal , motto = , established = *970/972 first foundat ...
was another early madrasa now recognized as a university. The madrasa is one of the relics of the
Fatimid The Fatimid Caliphate was an Ismaili Shi'a caliphate extant from the tenth to the twelfth centuries AD. Spanning a large area of North Africa, it ranged from the Atlantic Ocean in the west to the Red Sea in the east. The Fatimids, a dy ...
caliphate. The Fatimids traced their descent to Muhammad's daughter
Fatimah Fāṭima bint Muḥammad ( ar, فَاطِمَة ٱبْنَت مُحَمَّد}, 605/15–632 CE), commonly known as Fāṭima al-Zahrāʾ (), was the daughter of the Islamic prophet Muhammad and his wife Khadija. Fatima's husband was Ali, th ...
and named the institution using a variant of her honorific title ''Al-Zahra'' (the brilliant). Organized instruction in the
Al-Azhar Mosque Al-Azhar Mosque ( ar, الجامع الأزهر, al-Jāmiʿ al-ʾAzhar, lit=The Resplendent Congregational Mosque, arz, جامع الأزهر, Gāmiʿ el-ʾazhar), known in Egypt simply as al-Azhar, is a mosque in Cairo, Egypt in the historic ...
began in 978.


Law

Juristic thought gradually developed in study circles, where independent scholars met to learn from a local master and discuss religious topics. At first, these circles were fluid in their membership, but with time distinct regional legal schools crystallized around shared sets of methodological principles. As the boundaries of the schools became clearly delineated, the authority of their doctrinal tenets came to be vested in a master jurist from earlier times, who was henceforth identified as the school's founder. In the course of the first three centuries of Islam, all legal schools came to accept the broad outlines of classical legal theory, according to which Islamic law had to be firmly rooted in the Quran and hadith. The classical theory of Islamic jurisprudence elaborates how scriptures should be interpreted from the standpoint of linguistics and rhetoric. It also comprises methods for establishing authenticity of hadith and for determining when the legal force of a scriptural passage is abrogated by a passage revealed at a later date. In addition to the Quran and sunnah, the classical theory of Sunni fiqh recognizes two other sources of law: juristic consensus ('' ijmaʿ'') and analogical reasoning (''
qiyas In Islamic jurisprudence, qiyas ( ar, قياس , "analogy") is the process of deductive analogy in which the teachings of the hadith are compared and contrasted with those of the Quran, in order to apply a known injunction ('' nass'') to a new ...
''). It therefore studies the application and limits of analogy, as well as the value and limits of consensus, along with other methodological principles, some of which are accepted by only certain legal schools. This interpretive apparatus is brought together under the rubric of
ijtihad ''Ijtihad'' ( ; ar, اجتهاد ', ; lit. physical or mental ''effort'') is an Islamic legal term referring to independent reasoning by an expert in Islamic law, or the thorough exertion of a jurist's mental faculty in finding a solution to a le ...
, which refers to a jurist's exertion in an attempt to arrive at a ruling on a particular question. The theory of
Twelver Shia Twelver Shīʿīsm ( ar, ٱثْنَا عَشَرِيَّة; '), also known as Imāmīyyah ( ar, إِمَامِيَّة), is the largest branch of Shīʿa Islam, comprising about 85 percent of all Shīʿa Muslims. The term ''Twelver'' refers t ...
jurisprudence parallels that of Sunni schools with some differences, such as recognition of reason ('' ʿaql'') as a source of law in place of ''qiyas'' and extension of the notion of sunnah to include traditions of the
imams Imam (; ar, إمام '; plural: ') is an Islamic leadership position. For Sunni Muslims, Imam is most commonly used as the title of a worship leader of a mosque. In this context, imams may lead Islamic worship services, lead prayers, serve ...
. The body of substantive Islamic law was created by independent jurists (
mufti A Mufti (; ar, مفتي) is an Islamic jurist qualified to issue a nonbinding opinion ('' fatwa'') on a point of Islamic law (''sharia''). The act of issuing fatwas is called ''iftāʾ''. Muftis and their ''fatwas'' played an important rol ...
s). Their legal opinions (
fatwa A fatwā ( ; ar, فتوى; plural ''fatāwā'' ) is a legal ruling on a point of Islamic law (''sharia'') given by a qualified '' Faqih'' (Islamic jurist) in response to a question posed by a private individual, judge or government. A jurist i ...
s) were taken into account by ruler-appointed
judges A judge is an official who presides over a court. Judge or Judges may also refer to: Roles *Judge, an alternative name for an adjudicator in a competition in theatre, music, sport, etc. *Judge, an alternative name/aviator call sign for a membe ...
who presided over ''
qāḍī A qāḍī ( ar, قاضي, Qāḍī; otherwise transliterated as qazi, cadi, kadi, or kazi) is the magistrate or judge of a '' sharīʿa'' court, who also exercises extrajudicial functions such as mediation, guardianship over orphans and mino ...
's'' courts, and by ''maẓālim'' courts, which were controlled by the ruler's council and administered criminal law.


Theology

Classical Islamic theology emerged from an early doctrinal controversy which pitted the ''
ahl al-hadith Ahl al-Ḥadīth ( ar, أَهْل الحَدِيث, translation=The People of Hadith) was an Islamic school of Sunni Islam that emerged during the 2nd/3rd Islamic centuries of the Islamic era (late 8th and 9th century CE) as a movement of hadith ...
'' movement, led by
Ahmad ibn Hanbal Ahmad ibn Hanbal al-Dhuhli ( ar, أَحْمَد بْن حَنْبَل الذهلي, translit=Aḥmad ibn Ḥanbal al-Dhuhlī; November 780 – 2 August 855 CE/164–241 AH), was a Muslim jurist, theologian, ascetic, hadith traditionist, and ...
, who considered the Quran and authentic hadith to be the only acceptable authority in matters of faith, against
Mu'tazilite Muʿtazila ( ar, المعتزلة ', English: "Those Who Withdraw, or Stand Apart", and who called themselves ''Ahl al-ʿAdl wa al-Tawḥīd'', English: "Party of ivineJustice and Oneness f God); was an Islamic group that appeared in early Islamic ...
s and other theological currents, who developed theological doctrines using rationalistic methods. In 833 the caliph
al-Ma'mun Abu al-Abbas Abdallah ibn Harun al-Rashid ( ar, أبو العباس عبد الله بن هارون الرشيد, Abū al-ʿAbbās ʿAbd Allāh ibn Hārūn ar-Rashīd; 14 September 786 – 9 August 833), better known by his regnal name Al-Ma'mu ...
tried to impose Mu'tazilite theology on all religious scholars and instituted an inquisition (''
mihna The Mihna ( ar, محنة خلق القرآن, ''Miḥnat k͟halaq al-Qurʾān'' "ordeal egardingthe createdness of the Qur'an") refers to the period of religious persecution instituted by the 'Abbasid Caliph al-Ma'mun in 833 CE in which reli ...
''), but the attempts to impose a caliphal writ in matters of religious orthodoxy ultimately failed. This controversy persisted until
al-Ash'ari Abū al-Ḥasan al-Ashʿarī (; full name: ''Abū al-Ḥasan ʿAlī ibn Ismāʿīl ibn Isḥāq al-Ashʿarī''; c. 874–936 CE/260–324 AH), often reverently referred to as Imām al-Ashʿarī by Sunnī Muslims, was an Arab Muslim scholar ...
(874–936) found a middle ground between Mu'tazilite rationalism and Hanbalite literalism, using the rationalistic methods championed by Mu'tazilites to defend most substantive tenets maintained by ''ahl al-hadith''. A rival compromise between rationalism and literalism emerged from the work of
al-Maturidi Abū Manṣūr Muḥammad b. Muḥammad b. Maḥmūd al-Ḥanafī al-Māturīdī al-Samarḳandī ( fa, أبو منصور محمد بن محمد بن محمود الماتریدي السمرقندي الحنفي; 853–944 CE), often referred t ...
(d. c. 944), and, although a minority of scholars remained faithful to the early ''ahl al-hadith'' creed,
Ash'ari Ashʿarī theology or Ashʿarism (; ar, الأشعرية: ) is one of the main Sunnī schools of Islamic theology, founded by the Muslim scholar, Shāfiʿī jurist, reformer, and scholastic theologian Abū al-Ḥasan al-Ashʿarī in the ...
and
Maturidi Māturīdī theology or Māturīdism ( ar, الماتريدية: ''al-Māturīdiyyah'') is one of the main Sunnī schools of Islamic theology, founded by the Persian Muslim scholar, Ḥanafī jurist, reformer (''Mujaddid''), and scholastic th ...
theology came to dominate Sunni Islam from the 10th century on.


Philosophy

Ibn Sina Ibn Sina ( fa, ابن سینا; 980 – June 1037 CE), commonly known in the West as Avicenna (), was a Persian polymath who is regarded as one of the most significant physicians, astronomers, philosophers, and writers of the Islamic G ...
(Avicenna) and
Ibn Rushd Ibn Rushd ( ar, ; full name in ; 14 April 112611 December 1198), often Latinized as Averroes ( ), was an Andalusian polymath and jurist who wrote about many subjects, including philosophy, theology, medicine, astronomy, physics, psychology, ...
(Averroes) played a major role in interpreting the works of Aristotle, whose ideas came to dominate the non-religious thought of the
Christian Christians () are people who follow or adhere to Christianity, a monotheistic Abrahamic religion based on the life and teachings of Jesus Christ. The words ''Christ'' and ''Christian'' derive from the Koine Greek title ''Christós'' (Χρι ...
and
Muslim world The terms Muslim world and Islamic world commonly refer to the Islamic community, which is also known as the Ummah. This consists of all those who adhere to the religious beliefs and laws of Islam or to societies in which Islam is practiced. I ...
s. According to the
Stanford Encyclopedia of Philosophy The ''Stanford Encyclopedia of Philosophy'' (''SEP'') combines an online encyclopedia of philosophy with peer-reviewed publication of original papers in philosophy, freely accessible to Internet users. It is maintained by Stanford University. Eac ...
, translation of philosophical texts from Arabic to Latin in Western Europe "led to the transformation of almost all philosophical disciplines in the medieval Latin world". The influence of Islamic philosophers in Europe was particularly strong in natural philosophy, psychology and metaphysics, though it also influenced the study of logic and ethics.


Metaphysics

Ibn Sina argued his "
Floating man Floating man is the proper translation of the verb "yahwā in al-Nafs," which means "to fall down." Flying man is another term used cohesively to describe a floating man. According to Ibn Sina, it is considered a thought experience to determine ...
" thought experiment concerning
self-awareness In philosophy of self, self-awareness is the experience of one's own personality or individuality. It is not to be confused with consciousness in the sense of qualia. While consciousness is being aware of one's environment and body and lifesty ...
, in which a man prevented of sense experience by being blindfolded and free falling would still be aware of his existence.


Epistemology

In
epistemology Epistemology (; ), or the theory of knowledge, is the branch of philosophy concerned with knowledge. Epistemology is considered a major subfield of philosophy, along with other major subfields such as ethics, logic, and metaphysics. Episte ...
,
Ibn Tufail Ibn Ṭufail (full Arabic name: ; Latinized form: ''Abubacer Aben Tofail''; Anglicized form: ''Abubekar'' or ''Abu Jaafar Ebn Tophail''; c. 1105 – 1185) was an Arab Andalusian Muslim polymath: a writer, Islamic philosopher, Islamic theolo ...
wrote the novel ''
Hayy ibn Yaqdhan ''Ḥayy ibn Yaqẓān'' () is an Arabic philosophical novel and an allegorical tale written by Ibn Tufail (c. 1105 – 1185) in the early 12th century in Al-Andalus. Names by which the book is also known include the ('The Self-Taught Philosop ...
'' and in response Ibn al-Nafis wrote the novel ''
Theologus Autodidactus ''Theologus Autodidactus'' ("The Self-taught Theologian"), originally titled ''The Treatise of Kāmil on the Prophet's Biography'' ( ar, الرسالة الكاملية في السيرة النبوية), also known as ''Risālat Fādil ibn Nātiq'' ...
''. Both were concerning
autodidacticism Autodidacticism (also autodidactism) or self-education (also self-learning and self-teaching) is education without the guidance of masters (such as teachers and professors) or educational institution, institutions (such as schools). Generally, ...
as illuminated through the life of a
feral child A feral child (also called wild child) is a young individual who has lived isolated from human contact from a very young age, with little or no experience of human care, social behavior, or language. The term is used to refer to children who h ...
spontaneously generated in a cave on a
desert island A desert island, deserted island, or uninhabited island, is an island, islet or atoll that is not permanently populated by humans. Uninhabited islands are often depicted in films or stories about shipwrecked people, and are also used as stereot ...
.


Mathematics


Algebra

Persian mathematician
Muḥammad ibn Mūsā al-Khwārizmī Muhammad ( ar, مُحَمَّد;  570 – 8 June 632 CE) was an Arab religious, social, and political leader and the founder of Islam. According to Islamic doctrine, he was a prophet divinely inspired to preach and confirm the mono ...
played a significant role in the development of
algebra Algebra () is one of the broad areas of mathematics. Roughly speaking, algebra is the study of mathematical symbols and the rules for manipulating these symbols in formulas; it is a unifying thread of almost all of mathematics. Elementary a ...
,
arithmetic Arithmetic () is an elementary part of mathematics that consists of the study of the properties of the traditional operations on numbers— addition, subtraction, multiplication, division, exponentiation, and extraction of roots. In the 19th ...
and
Hindu-Arabic numerals Arabic numerals are the ten numerical digits: , , , , , , , , and . They are the most commonly used symbols to write decimal numbers. They are also used for writing numbers in other systems such as octal, and for writing identifiers such as c ...
. He has been described as the father or founder of
algebra Algebra () is one of the broad areas of mathematics. Roughly speaking, algebra is the study of mathematical symbols and the rules for manipulating these symbols in formulas; it is a unifying thread of almost all of mathematics. Elementary a ...
. Another Persian mathematician,
Omar Khayyam Ghiyāth al-Dīn Abū al-Fatḥ ʿUmar ibn Ibrāhīm Nīsābūrī (18 May 1048 – 4 December 1131), commonly known as Omar Khayyam ( fa, عمر خیّام), was a polymath, known for his contributions to mathematics, astronomy, philosophy, an ...
, is credited with identifying the foundations of
Analytic geometry In classical mathematics, analytic geometry, also known as coordinate geometry or Cartesian geometry, is the study of geometry using a coordinate system. This contrasts with synthetic geometry. Analytic geometry is used in physics and engineerin ...
. Omar Khayyam found the general geometric solution of the
cubic equation In algebra, a cubic equation in one variable is an equation of the form :ax^3+bx^2+cx+d=0 in which is nonzero. The solutions of this equation are called roots of the cubic function defined by the left-hand side of the equation. If all of the ...
. His book ''Treatise on Demonstrations of Problems of Algebra'' (1070), which laid down the principles of algebra, is part of the body of Persian mathematics that was eventually transmitted to Europe. Yet another Persian mathematician,
Sharaf al-Dīn al-Tūsī Sharaf al-Dīn al-Muẓaffar ibn Muḥammad ibn al-Muẓaffar al-Ṭūsī ( fa, شرف‌الدین مظفر بن محمد بن مظفر توسی; 1135 – 1213) was an Iranian mathematician and astronomer of the Islamic Golden Age (during the ...
, found algebraic and numerical solutions to various cases of cubic equations. He also developed the concept of a
function Function or functionality may refer to: Computing * Function key, a type of key on computer keyboards * Function model, a structured representation of processes in a system * Function object or functor or functionoid, a concept of object-oriente ...
.


Geometry

Islamic art makes use of
geometric patterns A pattern is a regularity in the world, in human-made design, or in abstract ideas. As such, the elements of a pattern repeat in a predictable manner. A geometric pattern is a kind of pattern formed of geometric shapes and typically repeated l ...
and symmetries in many of its art forms, notably in
girih ''Girih'' ( fa, گره, "knot", also written ''gereh'') are decorative Islamic geometric patterns used in architecture and handicraft objects, consisting of angled lines that form an interlaced strapwork pattern. ''Girih'' decoration is beli ...
tilings. These are formed using a set of five tile shapes, namely a regular
decagon In geometry, a decagon (from the Greek δέκα ''déka'' and γωνία ''gonía,'' "ten angles") is a ten-sided polygon or 10-gon.. The total sum of the interior angles of a simple decagon is 1440°. A self-intersecting ''regular decagon'' i ...
, an elongated
hexagon In geometry, a hexagon (from Ancient Greek, Greek , , meaning "six", and , , meaning "corner, angle") is a six-sided polygon. The total of the internal angles of any simple polygon, simple (non-self-intersecting) hexagon is 720°. Regular hexa ...
, a bow tie, a
rhombus In plane Euclidean geometry, a rhombus (plural rhombi or rhombuses) is a quadrilateral whose four sides all have the same length. Another name is equilateral quadrilateral, since equilateral means that all of its sides are equal in length. The ...
, and a regular
pentagon In geometry, a pentagon (from the Greek πέντε ''pente'' meaning ''five'' and γωνία ''gonia'' meaning ''angle'') is any five-sided polygon or 5-gon. The sum of the internal angles in a simple pentagon is 540°. A pentagon may be simpl ...
. All the sides of these tiles have the same length; and all their angles are multiples of 36° (π/5
radian The radian, denoted by the symbol rad, is the unit of angle in the International System of Units (SI) and is the standard unit of angular measure used in many areas of mathematics. The unit was formerly an SI supplementary unit (before that c ...
s), offering fivefold and tenfold symmetries. The tiles are decorated with
strapwork In the history of art and design, strapwork is the use of stylised representations in ornament of ribbon-like forms. These may loosely imitate leather straps, parchment or metal cut into elaborate shapes, with piercings, and often interwoven in ...
lines (girih), generally more visible than the tile boundaries. In 2007, the physicists
Peter Lu Peter James Lu, PhD (陸述義) is a post-doctoral research fellow in the Department of Physics and the School of Engineering and Applied Sciences at Harvard University in Cambridge, Massachusetts. He has been recognized for his discoveries of ...
and
Paul Steinhardt Paul Joseph Steinhardt (born December 25, 1952) is an American theoretical physicist whose principal research is in cosmology and condensed matter physics. He is currently the Albert Einstein Professor in Science at Princeton University, where he ...
argued that girih from the 15th century resembled
quasicrystalline A quasiperiodic crystal, or quasicrystal, is a structure that is ordered but not periodic. A quasicrystalline pattern can continuously fill all available space, but it lacks translational symmetry. While crystals, according to the classical c ...
Penrose tiling A Penrose tiling is an example of an aperiodic tiling. Here, a ''tiling'' is a covering of the plane by non-overlapping polygons or other shapes, and ''aperiodic'' means that shifting any tiling with these shapes by any finite distance, without r ...
s. Elaborate geometric
zellige ''Zellij'' ( ar, الزليج, translit=zillīj; also spelled zillij or zellige) is a style of mosaic tilework made from individually hand-chiseled tile pieces. The pieces were typically of different colours and fitted together to form various pa ...
tilework is a distinctive element in
Moroccan architecture Moroccan architecture refers to the architecture characteristic of Morocco throughout its history and up to modern times. The country's diverse geography and long history, marked by successive waves of settlers through both migration and military ...
.
Muqarnas Muqarnas ( ar, مقرنص; fa, مقرنس), also known in Iranian architecture as Ahoopāy ( fa, آهوپای) and in Iberian architecture as Mocárabe, is a form of ornamented vaulting in Islamic architecture. It is the archetypal form of I ...
vaults are three-dimensional but were designed in two dimensions with drawings of geometrical cells.
Jamshīd al-Kāshī Ghiyāth al-Dīn Jamshīd Masʿūd al-Kāshī (or al-Kāshānī) ( fa, غیاث الدین جمشید کاشانی ''Ghiyās-ud-dīn Jamshīd Kāshānī'') (c. 1380 Kashan, Iran – 22 June 1429 Samarkand, Transoxania) was a Persian astronomer a ...
's estimate of pi would not be surpassed for 180 years.


Trigonometry

Ibn Muʿādh al-Jayyānī Abū ʿAbd Allāh Muḥammad ibn Muʿādh al-Jayyānī ( ar, أبو عبد الله محمد بن معاذ الجياني; 989, Cordova, Al-Andalus – 1079, Jaén, Al-Andalus) was an Arab, mathematician, Islamic scholar, and Qadi from Al-Andal ...
is one of the several Islamic mathematicians on whom the
law of sines In trigonometry, the law of sines, sine law, sine formula, or sine rule is an equation relating the lengths of the sides of any triangle to the sines of its angles. According to the law, \frac \,=\, \frac \,=\, \frac \,=\, 2R, where , and a ...
is attributed; he wrote "''The Book of Unknown Arcs of a Sphere''" in the 11th century. This formula relates the lengths of the sides of any triangle, rather than only
right triangle A right triangle (American English) or right-angled triangle (British), or more formally an orthogonal triangle, formerly called a rectangled triangle ( grc, ὀρθόσγωνία, lit=upright angle), is a triangle in which one angle is a right an ...
s, to the sines of its angles. According to the law, : \frac \,=\, \frac \,=\, \frac. where , and are the lengths of the sides of a triangle, and , and are the opposite angles (see figure).


Calculus

Alhazen Ḥasan Ibn al-Haytham, Latinized as Alhazen (; full name ; ), was a medieval mathematician, astronomer, and physicist of the Islamic Golden Age from present-day Iraq.For the description of his main fields, see e.g. ("He is one of the prin ...
discovered the sum formula for the fourth power, using a method that could be generally used to determine the sum for any integral power. He used this to find the volume of a
paraboloid In geometry, a paraboloid is a quadric surface that has exactly one axis of symmetry and no center of symmetry. The term "paraboloid" is derived from parabola, which refers to a conic section that has a similar property of symmetry. Every plane ...
. He could find the integral formula for any polynomial without having developed a general formula.


Natural sciences


Scientific method

Ibn al-Haytham Ḥasan Ibn al-Haytham, Latinized as Alhazen (; full name ; ), was a medieval mathematician, astronomer, and physicist of the Islamic Golden Age from present-day Iraq.For the description of his main fields, see e.g. ("He is one of the prin ...
(Alhazen) was a significant figure in the
history of scientific method The history of scientific method considers changes in the methodology of scientific inquiry, as distinct from the history of science itself. The development of rules for scientific reasoning has not been straightforward; scientific method has been ...
, particularly in his approach to experimentation, Sabra, A.I. (1989). The Optics of Ibn al-Haytham. Books I–II–III: On Direct Vision. London: The Warburg Institute, University of London. pp. 25–29. . and has been described as the "world's first true scientist". Avicenna made rules for testing the effectiveness of drugs, including that the effect produced by the experimental drug should be seen constantly or after many repetitions, to be counted. The
physician A physician (American English), medical practitioner (Commonwealth English), medical doctor, or simply doctor, is a health professional who practices medicine, which is concerned with promoting, maintaining or restoring health through th ...
Rhazes Abū Bakr al-Rāzī (full name: ar, أبو بکر محمد بن زکریاء الرازي, translit=Abū Bakr Muḥammad ibn Zakariyyāʾ al-Rāzī, label=none), () rather than ar, زکریاء, label=none (), as for example in , or in . In m ...
was an early proponent of experimental medicine and recommended using control for clinical research. He said: "If you want to study the effect of bloodletting on a condition, divide the patients into two groups, perform bloodletting only on one group, watch both, and compare the results."


Astronomy

Astronomy in Islam was able to grow greatly because of several key factors. One factor was geographically. The Islamic world was close to the ancient lands of the Greeks, which held valuable ancient knowledge of the heavens in Greek manuscripts. During the new
Abbasid Dynasty The Abbasid dynasty or Abbasids ( ar, بنو العباس, Banu al-ʿAbbās) were an Arab dynasty that ruled the Abbasid Caliphate between 750 and 1258. They were from the Qurayshi Hashimid clan of Banu Abbas, descended from Abbas ibn Abd al-M ...
after the movement of the capital in 762 AD to Baghdad, translators were sponsored to translate Greek texts into Arabic. This translation period led to many major scientific works from
Galen Aelius Galenus or Claudius Galenus ( el, Κλαύδιος Γαληνός; September 129 – c. AD 216), often Anglicized as Galen () or Galen of Pergamon, was a Greek physician, surgeon and philosopher in the Roman Empire. Considered to be one of ...
,
Ptolemy Claudius Ptolemy (; grc-gre, Πτολεμαῖος, ; la, Claudius Ptolemaeus; AD) was a mathematician, astronomer, astrologer, geographer, and music theorist, who wrote about a dozen scientific treatises, three of which were of importanc ...
,
Aristotle Aristotle (; grc-gre, Ἀριστοτέλης ''Aristotélēs'', ; 384–322 BC) was a Greek philosopher and polymath during the Classical period in Ancient Greece. Taught by Plato, he was the founder of the Peripatetic school of phil ...
,
Euclid Euclid (; grc-gre, Wikt:Εὐκλείδης, Εὐκλείδης; BC) was an ancient Greek mathematician active as a geometer and logician. Considered the "father of geometry", he is chiefly known for the ''Euclid's Elements, Elements'' trea ...
,
Archimedes Archimedes of Syracuse (;; ) was a Greek mathematician, physicist, engineer, astronomer, and inventor from the ancient city of Syracuse in Sicily. Although few details of his life are known, he is regarded as one of the leading scientists ...
, and Apollonius being translated into Arabic. From these translations previously lost knowledge of the cosmos was now being used to advance current astrological thinkers. The second key factor of astronomies growth was the religious observances followed by Muslims which expected them to pray at exact times during the day. These observances in timekeeping led to many questions in previous Greek mathematical astronomy, especially their timekeeping. The
Astrolabe An astrolabe ( grc, ἀστρολάβος ; ar, ٱلأَسْطُرلاب ; persian, ستاره‌یاب ) is an ancient astronomical instrument that was a handheld model of the universe. Its various functions also make it an elaborate inclin ...
was a Greek invention which was an important piece of Arabic astronomy. An Astrolabe is a handheld two-dimensional model of the sky which can solve problems of spherical astronomy. It is made up of lines of
altitude Altitude or height (also sometimes known as depth) is a distance measurement, usually in the vertical or "up" direction, between a reference datum and a point or object. The exact definition and reference datum varies according to the context ...
and
azimuth An azimuth (; from ar, اَلسُّمُوت, as-sumūt, the directions) is an angular measurement in a spherical coordinate system. More specifically, it is the horizontal angle from a cardinal direction, most commonly north. Mathematicall ...
with an index, horizon, hour circle, zenith, Rete, star pointer, and equator to accurately show where the stars are at that given moment. Use of the astrolabe is best expressed in
Al-Farghani Abū al-ʿAbbās Aḥmad ibn Muḥammad ibn Kathīr al-Farghānī ( ar, أبو العبّاس أحمد بن محمد بن كثير الفرغاني 798/800/805–870), also known as Alfraganus in the West, was an astronomer in the Abbasid court ...
's treatise on the astrolabe due to the mathematical way he applied the instrument to astrology, astronomy, and timekeeping. The earliest known Astrolabe in existence today comes from the Islamic period. It was made by
Nastulus Muḥammad ibn ʿAbd Allāh Nasṭūlus ( ar, محمد بن عبد الله نسطولس; known as Nasṭūlus, but also referred to as Basṭūlus) was a 10th century astronomer. He is known for making one of the oldest surviving astrolabes, da ...
in 927-28 AD and is now a treasure of the
Kuwait National Museum The Kuwait National Museum is the national museum of Kuwait, located in Kuwait City. It was established in 1983 and designed by architect Michel Ecochard. The museum comprises five buildings set around a central garden, their organization is pa ...
. In about 964 AD, the Persian astronomer
Abd al-Rahman al-Sufi ʿAbd al-Rahman al-Sufi ( fa, عبدالرحمن صوفی; December 7, 903 – May 25, 986) was an iranianRobert Harry van Gent. Biography of al-Sūfī'. "The Persian astronomer Abū al-Husayn ‘Abd al-Rahmān ibn ‘Umar al-Sūfī was born in ...
, writing in his ''
Book of Fixed Stars The ''Book of Fixed Stars'' ( ar, كتاب صور الكواكب ', literally ''The Book of the Shapes of Stars'') is an astronomical text written by Abd al-Rahman al-Sufi (Azophi) around 964. Following the translation movement in the 9th cent ...
'', described a "nebulous spot" in the
Andromeda constellation Andromeda is one of the 48 constellations listed by the 2nd-century Greco-Roman astronomer Ptolemy, and one of the 88 modern constellations. Located in the northern celestial hemisphere, it is named for Andromeda, daughter of Cassiopeia, ...
, the first definitive reference to what is now known to be the
Andromeda Galaxy The Andromeda Galaxy (IPA: ), also known as Messier 31, M31, or NGC 224 and originally the Andromeda Nebula, is a barred spiral galaxy with the diameter of about approximately from Earth and the nearest large galaxy to the Milky Way. The gala ...
, the nearest spiral galaxy to the
Milky Way The Milky Way is the galaxy that includes our Solar System, with the name describing the galaxy's appearance from Earth: a hazy band of light seen in the night sky formed from stars that cannot be individually distinguished by the naked eye ...
. One of the largest advances in Islamic astronomy was the rejection of the Ptolemaic system of the planets. This system developed by Ptolemy placed the sun, moon, and other planets in orbit around the Earth. Ptolemy thought that the planets moved on circles called epicycles and that their centers rode on
deferents In the Hipparchus, Hipparchian, Ptolemaic system#Ptolemaic model, Ptolemaic, and Copernican heliocentrism, Copernican systems of astronomy, the epicycle (, meaning "circle moving on another circle") was a geometric model used to explain the var ...
. The deferents were
eccentric Eccentricity or eccentric may refer to: * Eccentricity (behavior), odd behavior on the part of a person, as opposed to being "normal" Mathematics, science and technology Mathematics * Off-center, in geometry * Eccentricity (graph theory) of a v ...
, and the angular motion of a planet was uniform around the
equant Equant (or punctum aequans) is a mathematical concept developed by Claudius Ptolemy in the 2nd century AD to account for the observed motion of the planets. The equant is used to explain the observed speed change in different stages of the plane ...
which was a point opposite the deferent center. Simply, Ptolemy's models were a mathematical system for predicting the positions of the planets. One of the first to criticize this model was
Ibn al-Haytham Ḥasan Ibn al-Haytham, Latinized as Alhazen (; full name ; ), was a medieval mathematician, astronomer, and physicist of the Islamic Golden Age from present-day Iraq.For the description of his main fields, see e.g. ("He is one of the prin ...
, a leader of physics in the 11th century in Cairo. Then in the 13th century
Nasir al-Din al-Tusi Muhammad ibn Muhammad ibn al-Hasan al-Tūsī ( fa, محمد ابن محمد ابن حسن طوسی 18 February 1201 – 26 June 1274), better known as Nasir al-Din al-Tusi ( fa, نصیر الدین طوسی, links=no; or simply Tusi in the West ...
constructed the
Maragha Observatory The Maragheh observatory (Persian: رصدخانه مراغه), also spelled Maragha, Maragah, Marageh, and Maraga, was an astronomical observatory established in the mid 13th century under the patronage of the Ilkhanid Hulagu and the directorship ...
in what is today Iran. Al-Tusi found the equant dissatisfying and replaced it by adding a geometrical technique called a
Tusi-couple The Tusi couple is a mathematical device in which a small circle rotates inside a larger circle twice the diameter of the smaller circle. Rotations of the circles cause a point on the circumference of the smaller circle to oscillate back and fort ...
, which generates linear motion from the sum of two circular motions. Then,
Ibn al-Shatir ʿAbu al-Ḥasan Alāʾ al‐Dīn ʿAlī ibn Ibrāhīm al-Ansari known as Ibn al-Shatir or Ibn ash-Shatir ( ar, ابن الشاطر; 1304–1375) was an Arab astronomer, mathematician and engineer. He worked as '' muwaqqit'' (موقت, religious ...
who was working in Damascus in 1350 AD employed the Tusi-couple to successfully eliminate the equant as well as other objectionable circles that Ptolemy had used. This new model properly aligned the celestial spheres and was mathematically sound. This development by Ibn al-Shatir, as well as the Maragha astronomers remained relatively unknown in medieval Europe. The Tusi couple was later employed in
Ibn al-Shatir ʿAbu al-Ḥasan Alāʾ al‐Dīn ʿAlī ibn Ibrāhīm al-Ansari known as Ibn al-Shatir or Ibn ash-Shatir ( ar, ابن الشاطر; 1304–1375) was an Arab astronomer, mathematician and engineer. He worked as '' muwaqqit'' (موقت, religious ...
's
geocentric model In astronomy, the geocentric model (also known as geocentrism, often exemplified specifically by the Ptolemaic system) is a superseded description of the Universe with Earth at the center. Under most geocentric models, the Sun, Moon, stars, an ...
and
Nicolaus Copernicus Nicolaus Copernicus (; pl, Mikołaj Kopernik; gml, Niklas Koppernigk, german: Nikolaus Kopernikus; 19 February 1473 – 24 May 1543) was a Renaissance polymath, active as a mathematician, astronomer, and Catholic Church, Catholic cano ...
' Copernican heliocentrism, heliocentric model although it is not known who the intermediary is or if Copernicus rediscovered the technique independently. The names for some of the stars used, including Betelgeuse, Rigel, Vega, Aldebaran, and Fomalhaut are several of the names that come directly from Arabic origins or are the translations of Ptolemy's Greek descriptions which are still in use today.


Physics

Alhazen Ḥasan Ibn al-Haytham, Latinized as Alhazen (; full name ; ), was a medieval mathematician, astronomer, and physicist of the Islamic Golden Age from present-day Iraq.For the description of his main fields, see e.g. ("He is one of the prin ...
played a role in the development of optics. One of the prevailing theories of vision in his time and place was the Emission theory (vision), emission theory supported by
Euclid Euclid (; grc-gre, Wikt:Εὐκλείδης, Εὐκλείδης; BC) was an ancient Greek mathematician active as a geometer and logician. Considered the "father of geometry", he is chiefly known for the ''Euclid's Elements, Elements'' trea ...
and Ptolemy, where sight worked by the eye emitting rays of light, and the other was the Aristotelean theory that sight worked when the essence of objects flows into the eyes. Alhazen correctly argued that vision occurred when light, traveling in straight lines, reflects off an object into the eyes. Al-Biruni wrote of his insights into light, stating that its velocity must be immense when compared to the speed of sound.


Chemistry

The early Islamic period saw the establishment of some of the longest lived theoretical frameworks in alchemy and chemistry. The sulfur-mercury theory of metals, first attested in pseudo-Apollonius of Tyana's Sirr al-khaliqa, ''Sirr al-khalīqa'' ("The Secret of Creation", c. 750–850) and in the Arabic writings attributed to Jabir ibn Hayyan, Jābir ibn Ḥayyān (written c. 850–950), would remain the basis of all theories of metallic composition until the eighteenth century. Likewise, the ''Emerald Tablet'', a compact and cryptic text that all later alchemists up to and including Isaac Newton (1642–1727) would regard as the foundation of their art, first occurs in the ''Sirr al-khalīqa'' and in one of the works attributed to Jābir. Substantial advances were also made in practical chemistry. The works attributed to Jābir, and those of the Persian alchemist and physician Abu Bakr al-Razi, Abū Bakr al-Rāzī (c. 865–925), contain the earliest known systematic classifications of chemical substances. However, alchemists were not only interested in identifying and classifying chemical substances, but also in artificially creating them. Significant examples from the medieval Islamic world include the synthesis of ammonium chloride from Organic compound, organic substances as described in the works attributed to Jābir, and Abū Bakr al-Rāzī's experiments with vitriol, which would eventually lead to the discovery of mineral acids like sulfuric acid and nitric acid by thirteenth century Latin alchemists such as pseudo-Geber.


Geodesy

Al-Biruni (973–1048) estimated the earth radius, radius of the earth as 6339.6 km (modern value is c. 6,371 km), the best estimate at that time.


Biology

In the cardiovascular system, Ibn al-Nafis in his ''Commentary on Anatomy in Avicenna's Canon'' was the first known scholar to contradict the contention of the
Galen Aelius Galenus or Claudius Galenus ( el, Κλαύδιος Γαληνός; September 129 – c. AD 216), often Anglicized as Galen () or Galen of Pergamon, was a Greek physician, surgeon and philosopher in the Roman Empire. Considered to be one of ...
School that blood could pass between the ventricles in the heart through the cardiac inter-ventricular septum that separates them, saying that there is no passage between the ventricles at this point. Instead, he correctly argued that all the blood that reached the left ventricle did so after passing through the lung. He also stated that there must be small communications, or pores, between the pulmonary artery and pulmonary vein, a prediction that preceded the discovery of the pulmonary capillaries of Marcello Malpighi by 400 years. The ''Commentary'' was rediscovered in the twentieth century in the Prussian State Library in Berlin; whether its view of the pulmonary circulation influenced scientists such as Michael Servetus is unclear. In the nervous system, Rhazes stated that nerves had motor neuron, motor or sensory neuron, sensory functions, describing 7 cranial nerves, cranial and 31 spinal nerves, spinal cord nerves. He assigned a numerical order to the cranial nerves from the optic nerve, optic to the hypoglossal nerves. He classified the spinal nerves into 8 cervical nerves, cervical, 12 thoracic nerves, thoracic, 5 lumbar nerves, lumbar, 3 sacral nerves, sacral, and 3 coccygeal nerves. He used this to link clinical signs of injury to the corresponding location of lesions in the nervous system. Modern commentators have likened medieval accounts of the "struggle for existence" in the animal kingdom to the framework of the theory of evolution. Thus, in his survey of the history of the ideas which led to the theory of natural selection, Conway Zirkle noted that al-Jahiz was one of those who discussed a "struggle for existence", in his ''Kitāb al-Hayawān'' (Book of Animals), written in the 9th century. In the 13th century,
Nasir al-Din al-Tusi Muhammad ibn Muhammad ibn al-Hasan al-Tūsī ( fa, محمد ابن محمد ابن حسن طوسی 18 February 1201 – 26 June 1274), better known as Nasir al-Din al-Tusi ( fa, نصیر الدین طوسی, links=no; or simply Tusi in the West ...
believed that humans were derived from advanced animals, saying, "Such humans [probably anthropoid apes] live in the Western Sudan and other distant corners of the world. They are close to animals by their habits, deeds and behavior."Farid Alakbarov (Summer 2001)
A 13th-Century Darwin? Tusi's Views on Evolution
, ''Azerbaijan International'' 9 (2).
In 1377, Ibn Khaldun in his Muqaddimah stated, "The animal kingdom was developed, its species multiplied, and in the gradual process of Creation, it ended in man and arising from the world of the monkeys."


Engineering

The Banū Mūsā brothers, in their Book of Ingenious Devices, describe an Automaton, automatic flute player which may have been the first Program (machine), programmable machine. The flute sounds were produced through hot Steam power, steam and the user could adjust the device to various patterns so that they could get various sounds from it.


Social sciences

Ibn Khaldun is regarded to be among the founding fathers of modern sociology, historiography, demography, and economics. Archiving was a respected position during this time in Islam though most of the governing documents have been lost over time. However, from correspondence and remaining documentation gives a hint of the social climate as well as shows that the archives were detailed and vast during their time. All letters that were received or sent on behalf of the governing bodies were copied, archived and noted for filing. The position of the archivist was seen as one that had to have a high level of devotion as they held the records of all pertinent transactions.


Healthcare


Hospitals

The earliest known Islamic hospital was built in 805 in Baghdad by order of Harun Al-Rashid, and the most important of Baghdad's hospitals was established in 982 by the Buyid ruler 'Adud al-Dawla. The best documented early Islamic hospitals are the great Syro-Egyptian establishments of the 12th and 13th centuries. By the tenth century, Baghdad had five more hospitals, while
Damascus )), is an adjective which means "spacious". , motto = , image_flag = Flag of Damascus.svg , image_seal = Emblem of Damascus.svg , seal_type = Seal , map_caption = , ...
had six hospitals by the 15th century and Córdoba, Andalusia, Córdoba alone had 50 major hospitals, many exclusively for the military. The typical hospital was divided into departments such as systemic diseases, surgery, and orthopedics, with larger hospitals having more diverse specialties. "Systemic diseases" was the rough equivalent of today's internal medicine and was further divided into sections such as fever, infections and digestive issues. Every department had an officer-in-charge, a presiding officer and a supervising specialist. The hospitals also had lecture theaters and libraries. Hospitals staff included sanitary inspectors, who regulated cleanliness, and accountants and other administrative staff. The hospitals were typically run by a three-man board comprising a non-medical administrator, the chief pharmacist, called the shaykh saydalani, who was equal in rank to the chief physician, who served as mutwalli (dean). Medical facilities traditionally closed each night, but by the 10th century laws were passed to keep hospitals open 24 hours a day. For less serious cases, physicians staffed outpatient clinics. Cities also had first aid centers staffed by physicians for emergencies that were often located in busy public places, such as big gatherings for Friday prayers. The region also had mobile units staffed by doctors and pharmacists who were supposed to meet the need of remote communities. Baghdad was also known to have a separate hospital for convicts since the early 10th century after the vizier ‘Ali ibn Isa ibn Jarah ibn Thabit wrote to Baghdad's chief medical officer that "prisons must have their own doctors who should examine them every day". The first hospital built in Egypt, in Cairo's Southwestern quarter, was the first documented facility to care for mental illnesses. In Aleppo's Arghun Hospital, care for mental illness included abundant light, fresh air, running water and music. Medical students would accompany physicians and participate in patient care. Hospitals in this era were the first to require medical diplomas to license doctors. The licensing test was administered by the region's government appointed chief medical officer. The test had two steps; the first was to write a treatise, on the subject the candidate wished to obtain a certificate, of original research or commentary of existing texts, which they were encouraged to scrutinize for errors. The second step was to answer questions in an interview with the chief medical officer. Physicians worked fixed hours and medical staff salaries were fixed by law. For regulating the quality of care and arbitrating cases, it is related that if a patient dies, their family presents the doctor's prescriptions to the chief physician who would judge if the death was natural or if it was by negligence, in which case the family would be entitled to compensation from the doctor. The hospitals had male and female quarters while some hospitals only saw men and other hospitals, staffed by women physicians, only saw women. While women physicians practiced medicine, many largely focused on obstetrics. Hospitals were forbidden by law to turn away patients who were unable to pay. Eventually, charitable foundations called
waqf A waqf ( ar, وَقْف; ), also known as hubous () or '' mortmain'' property is an inalienable charitable endowment under Islamic law. It typically involves donating a building, plot of land or other assets for Muslim religious or charitabl ...
s were formed to support hospitals, as well as schools. Part of the state budget also went towards maintaining hospitals. While the services of the hospital were free for all citizens and patients were sometimes given a small stipend to support recovery upon discharge, individual physicians occasionally charged fees. In a notable endowment, a 13th-century governor of Egypt Al-Mansur Qalawun ordained a foundation for the Qalawun complex, Qalawun hospital that would contain a mosque and a chapel, separate wards for different diseases, a library for doctors and a pharmacy and the hospital is used today for ophthalmology. The Qalawun hospital was based in a former Fatimid palace which had accommodation for 8,000 people – "it served 4,000 patients daily." The waqf stated,
... The hospital shall keep all patients, men and women, until they are completely recovered. All costs are to be borne by the hospital whether the people come from afar or near, whether they are residents or foreigners, strong or weak, low or high, rich or poor, employed or unemployed, blind or sighted, physically or mentally ill, learned or illiterate. There are no conditions of consideration and payment, none is objected to or even indirectly hinted at for non-payment.


Pharmacies

Arabic scholars used their natural and cultural resources to contribute to the strong development of pharmacology. They believed that God had provided the means for a cure for every disease. However, there was confusion about the nature of some ancient plants that existed during this time. A prominent figure that was influential in the development of pharmacy used the name Yūhannā ibn Masawaiyh, Māsawaiyh (circa 777-857). He was referred to as "The Divine Mesue" and "The Prince of Medicine" by European scholars. Māsawaiyh led the first private medical school in Baghdad and wrote three major pharmaceutical treatises. These treatises consisted of works over compound medicines, humors, and pharmaceutical recipes that provided instructions on how they were to be prepared. In the Latin West, these works were typically published together under the title "Opera Medicinalia" and were broken up into "De simplicubus", "Grabadin", and "Canones universales". Although Masawaiyh, Māsawaiyh's influence was so significant that his writings became the most dominant source of pharmaceutical writings, his exact identity remains unclear. In the past, all substances that were to be introduced into, on or near the human body were labeled as medicine, ranging from drugs, food, beverages, even perfumes to cosmetics. The earliest distinction between medicine and pharmacy as disciplines began in the seventh century, when pharmacists and apothecaries appeared in the first hospitals. Demand for drugs increased as the population increased. By the ninth century where pharmacy was established as an independent and well-defined profession by Muslim scholars. It is said by many historians that the opening of the first private pharmacy in the eighth century marks the independence of pharmacy from medicine. The emergence of medicine and pharmacy within the Islamic caliphate by the ninth century occurred at the same time as rapid expansion of many scientific institutions, libraries, schools, hospitals and then pharmacies in many Muslim cities. The rise of alchemy during the ninth century also played a vital role for early pharmacological development. While Arab pharmacists were not successful in converting non-precious metals into precious metals, their works giving details of techniques and lab equipment were major contributors to the development of pharmacy. Chemical techniques such as distillation, condensation, evaporation and pulverization were often used. The Qur'an provided the basis for the development of professional ethics where the rise of ritual washing also influenced the importance of hygiene in pharmacology. Pharmacies were periodically visited by government inspectors called muhtasib, who checked to see that the medicines were mixed properly, not diluted and kept in clean jars. Work done by the muhtasib was carefully outlined in manuals that explained ways of examining and recognizing falsified drugs, foods and spices. It was forbidden for pharmacists to perform medical treatment without the presence of a physician, while physicians were limited to the preparation and handling of medications. It was feared that recipes would fall into the hands of someone without the proper pharmaceutical training. Licenses were required to run private practices. Violators were fined or beaten.


Medicine

The theory of Humorism was largely dominant during this time. Arab physician Ibn Zuhr provided proof that scabies is caused by the Sarcoptes scabiei, itch mite and that it can be cured by removing the parasite without the need for purging, bleeding or other treatments called for by humorism, making a break with the humorism of Galen and Avicenna.
Rhazes Abū Bakr al-Rāzī (full name: ar, أبو بکر محمد بن زکریاء الرازي, translit=Abū Bakr Muḥammad ibn Zakariyyāʾ al-Rāzī, label=none), () rather than ar, زکریاء, label=none (), as for example in , or in . In m ...
differentiated through careful observation the two diseases smallpox and measles, which were previously lumped together as a single disease that caused rashes. This was based on location and the time of the appearance of the symptoms and he also scaled the degree of severity and prognosis of infections according to the color and location of rashes. Al-Zahrawi was the first physician to describe an ectopic pregnancy, and the first physician to identify the hereditary nature of haemophilia. On Hygiene#Medical hygiene, hygienic practices, Rhazes, who was once asked to choose the site for a new hospital in Baghdad, suspended pieces of meat at various points around the city, and recommended building the hospital at the location where the meat putrefied the slowest. Al-Razi is sometimes called the "Father of pediatrics" for writing the monograph, ''The Diseases of Children'' treating paediatrics as an independent field of medicine. For Islamic scholars, Indian and Greek physicians and medical researchers Sushruta,
Galen Aelius Galenus or Claudius Galenus ( el, Κλαύδιος Γαληνός; September 129 – c. AD 216), often Anglicized as Galen () or Galen of Pergamon, was a Greek physician, surgeon and philosopher in the Roman Empire. Considered to be one of ...
, Mankah, Atreya,
Hippocrates Hippocrates of Kos (; grc-gre, Ἱπποκράτης ὁ Κῷος, Hippokrátēs ho Kôios; ), also known as Hippocrates II, was a Greek physician of the classical period who is considered one of the most outstanding figures in the history of ...
, Charaka, and Agnivesa were pre-eminent authorities. In order to make the Indian and Greek tradition more accessible, understandable, and teachable, Islamic scholars ordered and made more systematic the vast Indian and Greco-Roman medical knowledge by writing encyclopedias and summaries. Sometimes, past scholars were criticized, like Rhazes who criticized and refuted Galen's revered theories, most notably, the Humorism, Theory of Humors and was thus accused of ignorance. It was through 12th-century Latin translations of the 12th century, Arabic translations that medieval Europe rediscovered Ancient Greek medicine, Hellenic medicine, including the works of Galen and Hippocrates, and discovered Ayurveda, ancient Indian medicine, including the works of Sushruta and Charaka. Works such as Avicenna's ''The Canon of Medicine'' were translated into Latin and disseminated throughout Europe. During the 15th and 16th centuries alone, ''The Canon of Medicine'' was published more than thirty-five times. It was used as a standard medical textbook through the 18th century in Europe.


Surgery

Al-Zahrawi was a tenth century Al-Andalus, Arab physician. He is sometimes referred to as the "Father of surgery". He describes what is thought to be the first attempt at reduction mammaplasty for the management of gynaecomastia and the first mastectomy to treat breast cancer. He is credited with the performance of the first thyroidectomy. He wrote three textbooks on surgery, including ''Manual of Medial Practitioners'' which contains a catalog of 278 instruments used in surgery In the thirteenth century, Ibn al-Quff was a physician and surgeon who published numerous books, commentaries, treatises on surgery. Most notably, he wrote ''Basics in the Art of Surgery'', a general medical manual covering anatomy, drugs therapy and surgical care, which was by far the largest Arabic text on surgery during the entire medieval period.


Commerce and travel

Apart from the Nile, Tigris, and Euphrates, navigable rivers were uncommon in the Middle East, so transport by sea was very important. Navigational sciences were highly developed, making use of a rudimentary sextant (known as a kamal). When combined with detailed maps of the period, sailors were able to sail across oceans rather than skirt along the coast. Muslim sailors were also responsible for reintroducing large, three-masted merchant vessels to the Mediterranean. The name caravel may derive from an earlier Arab boat known as the ''qārib''. Many Muslims went to Islam during the Song dynasty, China to trade, and these Muslims began to have a great economic influence on the country. Muslims virtually dominated the import/export industry by the time of the Sung dynasty (960–1279). Muhammad al-Idrisi created the Tabula Rogeriana, the best maps of the Middle Ages, used by various explorers such as Christopher Columbus and Vasco Da Gama for their Voyages of Christopher Columbus, voyages in America and India.Houben, 2002, pp. 102–104.


Agriculture

The Arabs of
Al-Andalus Al-Andalus DIN 31635, translit. ; an, al-Andalus; ast, al-Ándalus; eu, al-Andalus; ber, ⴰⵏⴷⴰⵍⵓⵙ, label=Berber languages, Berber, translit=Andalus; ca, al-Àndalus; gl, al-Andalus; oc, Al Andalús; pt, al-Ândalus; es, ...
exerted a large impact on Spanish agriculture, including the restoration of Roman-era aqueducts and irrigation channels, as well as the introduction of new technologies such as the ''acequias'' (derived from the qanats of Persia) and Persian gardens (such as at the Generalife). In Spain and Sicily, the Arabs introduced crops and foodstuffs from the Persia and India such as rice, sugarcane, Orange (fruit), oranges, lemons, bananas, saffron, carrots, apricots and eggplants, as well as restoring cultivation of olives and pomegranates from Greco-Roman times. The Palmeral of Elche in southern Spain is a World Heritage Site, UNESCO World Heritage site that is emblematic of the Islamic agricultural legacy in Europe.


Arts and culture


Literature and poetry

The 13th century Seljuk Empire, Seljuq poet Rumi wrote some of the finest poetry in the Persian language and remains one of the best selling poets in America. Other famous poets of the Persian language include Hafez (whose work was read by William Jones, Thoreau, Goethe, Ralph Waldo Emerson and Friedrich Engels), Saadi Shirazi, Saadi (whose poetry was cited extensively by Goethe, Hegel and Voltaire), Ferdowsi,
Omar Khayyam Ghiyāth al-Dīn Abū al-Fatḥ ʿUmar ibn Ibrāhīm Nīsābūrī (18 May 1048 – 4 December 1131), commonly known as Omar Khayyam ( fa, عمر خیّام), was a polymath, known for his contributions to mathematics, astronomy, philosophy, an ...
and Amir Khusrau, Amir Khusrow. ''One Thousand and One Nights'', an anthology of Middle Eastern folk tales compiled in the Arabic language during the time of the Abbasid Caliphate, has had a large influence on Western and Middle Eastern literature and popular culture with such classics as Aladdin, Ali Baba and the Forty Thieves and Sinbad the Sailor. The folk-tale 'Sinbad the Sailor' even draws inspiration directly from Hellenistic literature like the Homer, Homeric epics (translated from Greek to Arabic in the 8th century CE) and Alexander Romances (tales of Alexander the Great popular in Europe, the Middle East and India).


Art

Calligraphy, an essential aspect of written Arabic language, Arabic, developed in manuscripts and architectural decoration. This form of visual art can be found adorning the walls of palaces, the interior and domes of mosques as well as the surrounding structure of Minbar, minbars. Calligraphy would use a variety of stylised and standardised scripts, two major scripts among them being ''kufic'' and ''Naskh (script), naskh.'' Ceramics, metalwork and glassware were also brilliantly decorated with geometric patterns and vibrant colors. Manuscript illumination was an important art, and Persian miniature painting flourished in the Persianate world, and went on to influence miniature art in the Ottoman and Mughal court between the 16th–17th centuries. Very few surviving records of wall painting exists, especially ones that represented the human face. A rare example of this are the early 9th-century fragments from the ruins of the Dar al-Khilafah palace at Samarra from the Abbasid period. These are fragments of larger wall paintings depicting harem women, period-era clothing and animals.


Music

The ninth and tenth centuries saw a flowering of Arabic music. Philosopher and esthete Al-Farabi, at the end of the ninth century, established the foundations of modern Arabic music theory, based on the Arab Maqam, maqammat, or musical modes. His work was based on the music of Ziryab, the court musician of Andalusia. Ziryab was a renowned polymath, whose contributions to western civilization included formal dining, haircuts, chess, and more, in addition to his dominance of the world musical scene of the ninth century. The Sumerians and Akkadians, the Greeks, and the Persians all used math to create notes used on lutes and lyres and other stringed instruments. Using the idea that a plucked or bowed string produces a note, they noticed the difference in tone when a string is stopped. "The great discovery" was hearing the double octave, that halving a string produces a note one octave above the string. Written as a ratio 2:1. They measured the ratios of string lengths on one side and the other of where the string was pressed, creating ratios. Those ratios allowed them to compare sounds, for example third intervals, fourths, fifths. They were able to tune one string against another in those intervals on lutes, lyres, harps, zithers. Lutes gave them the further ability to create those intervals on a single string, by adding frets at mathematically spaced distances, based on the ratios. Unlike modern instruments, where frets may be permanently fixed into the neck, as on a guitar, the older instruments used gut strings tied around the neck for frets, and this made their instruments adjustable. Early musicians could tune their instruments to different Mode (music), modes. Lute players could tune the strings to different Interval (music), intervals, and could further adjust the frets for the modes. The mixing cultures of Central Asia and Arabia produced several thinkers who wrote about music, including something about the lute in their works, including Al-Kindi (c. 801 – c. 873), Ziryab (789–857), Al-Farabi (c. 872 – c. 950), Avicenna (c. 980 – 1037), and Safi al-Din al-Urmawi (1216–1294). They wrote in Arabic, what had become the useful lingua-Franca of their time, and took part in Muslim society and culture. However they were brought up in Central Asia. The Arabs had a musical scale, described by al-Farabi, in use by some through the 13th century A.D. That tanbar scale, which divided the string into "40 equal parts" may have been a leftover from Babylon and Assyria. However, the Arabs traded with and conquered the Persians, and they adopted Persian scales for their lutes, just as they adopted Persian short-necked lutes. Ziryab moved from Baghdad to al-Andalus, where he set up a school of music and was one of the first to add a fifth string or course to oud, "between 822 and 852). Al-Andalus, where he settled would become a center of musical instrument development for Europe. Al-Kindi was a polymath who wrote as many as 15 music-related treatises. He was among the first to apply Greek musical theory to Central Asian-Arabian short lutes. He added semi-tones between the nut and the first string. He also added a fifth string to his oud in the east, as Ziryab had done in the west. Al-Farabi "fully incorporated the works of Aristoxenus and
Ptolemy Claudius Ptolemy (; grc-gre, Πτολεμαῖος, ; la, Claudius Ptolemaeus; AD) was a mathematician, astronomer, astrologer, geographer, and music theorist, who wrote about a dozen scientific treatises, three of which were of importanc ...
into his theory of tetrachords", and wrote among books in many subjects, the Kitab al-Musiqa al-Kabir, the ''Major Book of Music'', in which he detailed how to tune an oud, using mathematical ratios. He gave instruction for both 10 frets and 12, telling where to place the tied (and moveable) gut-string frets on the neck. His way of tuning allowed a "12-fret ‘ud tuning — which results ... 'double-octave' scale", with 22 notes in each octave.


Architecture

The Mosque of Uqba, Great Mosque of Kairouan (in Tunisia), the ancestor of all the mosques in the western Islamic world excluding Turkey and the Balkans, is one of the best preserved and most significant examples of early great mosques. Founded in 670, it dates in its present form largely from the 9th century. The Great Mosque of Kairouan is constituted of a three-tiered square minaret, a large courtyard surrounded by colonnaded porticos, and a huge hypostyle prayer hall covered on its axis by two cupolas. The Great Mosque of Samarra in Iraq was completed in 847. It combined the hypostyle architecture of rows of columns supporting a flat base, above which a huge spiralling minaret was constructed. The beginning of construction of the Cathedral–Mosque of Córdoba, Great Mosque at Cordoba in 785 marked the beginning of Islamic architecture in Spain and Northern Africa. The mosque is noted for its striking interior arches. Moorish architecture reached its peak with the construction of the Alhambra, the magnificent palace/fortress of Granada, with its open and breezy interior spaces adorned in red, blue, and gold. The walls are decorated with stylized foliage motifs, Arabic language, Arabic inscriptions, and Arabesque (Islamic art), arabesque design work, with walls covered in Islamic geometric patterns, geometrically patterned glazed tiles. Many traces of Fatimid architecture exist in Cairo today, the most defining examples include the Al Azhar University and the Al-Hakim Mosque, Al Hakim mosque.


Decline


Cultural factors

Economic historian Joel Mokyr has argued that Islamic philosopher al-Ghazali (1058–1111), the author of Incoherence of the Philosophers, "was a key figure in the decline in Islamic science" and that this led to a cultural shift shunning away from scientific thinking. However, it is argued that al-Ghazali was instead an admirer and adherent of philosophy but was criticizing the use of philosophy in religious matters only. Additionally, Saliba (2007) has pointed out that the golden age did not slow down after al-Ghazali, who lived in the 11th century, while others extend the golden age to around the 16th to 17th centuries.


Political and economic factors

Ahmad Y. al-Hassan has rejected the thesis that lack of creative thinking was a cause, arguing that science was always kept separate from religious argument; he instead analyzes the decline in terms of economic and political factors, drawing on the work of the 14th-century writer Ibn Khaldun. Several other contemporary scholars have analysed the decline in terms of political and economic factors. Current research has led to the conclusion that "the available evidence is consistent with the hypothesis that an increase in the political power of these elites caused the observed decline in scientific output." The decline could be part of a larger trend where the non-Western world fell behind the West in the Great Divergence. In 1206, Genghis Khan established the Mongol Empire which, during the 13th century, conquered most of the Eurasian land mass, including China in the east and much of the old Islamic caliphate (as well as Kievan Rus') in the west. The Siege of Baghdad (1258), destruction of Baghdad and the
House of Wisdom The House of Wisdom ( ar, بيت الحكمة, Bayt al-Ḥikmah), also known as the Grand Library of Baghdad, refers to either a major Abbasid public academy and intellectual center in Baghdad or to a large private library belonging to the Abba ...
by Hulagu Khan in 1258 has been seen by some as the end of the Islamic Golden Age. However, while cultural influence used to radiate outward from Baghdad, after the fall of Baghdad, Iran and Central Asia saw a cultural flourishing by benefiting from increased cross-cultural access to East Asia under Mongol rule.


See also


References


Notes


Citations


Further reading

* * * , pp. 39–79 () * * George Nicholas Atiyeh; John Richard Hayes (1992). ''[ The Genius of Arab Civilization]''. New York University Press. . p. 306. * * * * Dario Fernandez-Morera (2015) ''The Myth of the Andalusian Paradise. Muslims, Christians, and Jews under Islamic Rule in Medieval Spain.'' ISI Books (hardback) * Joel Epstein (2019) ''The Language of the Heart'' Juwal Publications *


External links

*
Islamicweb.com: History of the Golden Age


, ''by Gaston Wiet''.
U.S. Library of Congress.gov: The Kirkor Minassian Collection
– ''contains examples of Islamic book bindings''. {{History of science Islamic Golden Age, Science in the medieval Islamic world Islamic culture Medieval Islamic world Medieval European education 8th-century Islam 9th-century Islam 10th-century Islam 12th-century Islam 13th-century Islam Religion in the Middle Ages Science in the Middle Ages 8th century in Asia 9th century in Asia 10th century in Asia 11th century in Asia 12th century in Asia 13th century in Asia Golden ages (metaphor)