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Pope Sylvester II (; – 12 May 1003), originally known as Gerbert of Aurillac, was a scholar and teacher who served as the
bishop of Rome The pope is the bishop of Rome and the visible head of the worldwide Catholic Church. He is also known as the supreme pontiff, Roman pontiff, or sovereign pontiff. From the 8th century until 1870, the pope was the sovereign or head of sta ...
and ruled the
Papal States The Papal States ( ; ; ), officially the State of the Church, were a conglomeration of territories on the Italian peninsula under the direct sovereign rule of the pope from 756 to 1870. They were among the major states of Italy from the 8th c ...
from 999 to his death. He endorsed and promoted study of
Moorish The term Moor is an exonym used in European languages to designate the Muslim populations of North Africa (the Maghreb) and the Iberian Peninsula (particularly al-Andalus) during the Middle Ages. Moors are not a single, distinct or self-defi ...
and
Greco-Roman The Greco-Roman world , also Greco-Roman civilization, Greco-Roman culture or Greco-Latin culture (spelled Græco-Roman or Graeco-Roman in British English), as understood by modern scholars and writers, includes the geographical regions and co ...
arithmetic, mathematics and astronomy, reintroducing to Western Christendom the
abacus An abacus ( abaci or abacuses), also called a counting frame, is a hand-operated calculating tool which was used from ancient times in the ancient Near East, Europe, China, and Russia, until the adoption of the Hindu–Arabic numeral system. A ...
,
armillary sphere An armillary sphere (variations are known as spherical astrolabe, armilla, or armil) is a model of objects in the sky (on the celestial sphere), consisting of a spherical framework of rings, centered on Earth or the Sun, that represent lines o ...
, and
water organ The water organ or hydraulic organ () (early types are sometimes called hydraulos, hydraulus or hydraula) is a type of pipe organ blown by air, where the power source pushing the air is derived by water from a natural source (e.g. by a waterfal ...
, which had been lost to Latin Europe since the fall of the
Western Roman Empire In modern historiography, the Western Roman Empire was the western provinces of the Roman Empire, collectively, during any period in which they were administered separately from the eastern provinces by a separate, independent imperial court. ...
. He is said to be the first in Christian Europe (outside of
Al-Andalus Al-Andalus () was the Muslim-ruled area of the Iberian Peninsula. The name refers to the different Muslim states that controlled these territories at various times between 711 and 1492. At its greatest geographical extent, it occupied most o ...
) to introduce the
decimal The decimal numeral system (also called the base-ten positional numeral system and denary or decanary) is the standard system for denoting integer and non-integer numbers. It is the extension to non-integer numbers (''decimal fractions'') of th ...
numeral system using the Hindu-Arabic numeral system.


Early life

Gerbert was born about 946, or at any rate between 945 and 950. His exact birthplace is unknown, but it must have been in what was then the
Duchy of Aquitaine The Duchy of Aquitaine (, ; , ) was a historical fiefdom located in the western, central, and southern areas of present-day France, south of the river Loire. The full extent of the duchy, as well as its name, fluctuated greatly over the centuries ...
, part of the
Kingdom of France The Kingdom of France is the historiographical name or umbrella term given to various political entities of France in the Middle Ages, medieval and Early modern France, early modern period. It was one of the most powerful states in Europe from th ...
. More precise proposals include the town of Belliac, near the present-day commune of
Saint-Simon, Cantal Saint-Simon (; Auvergnat dialect, Auvergnat: ''Sant Simon'') is a Communes of France, commune in the Cantal Departments of France, department in south-central France. The medieval town of Belliac, located near the present-day Saint-Simon, was ...
, or
Aurillac Aurillac (; ) is the prefecture of the Cantal department, in the Auvergne-Rhône-Alpes region of France. Geography Aurillac is at above sea level and located at the foot of the Cantal mountains in a small sedimentary basin. The city is b ...
. Another speculated location is the province of Auvergne. Gerbert's parents, wanting him to have a quality education, took him to receive instruction at the nearby Benedictine Abbey. Here, Gerbert became a pupil of a monk named Raimund, who admired his desire of knowledge and assisted him in his studies. Around 963, he entered the Monastery of St. Gerald of Aurillac. In 967, Count
Borrell II of Barcelona Borrell II (died 993) was the count of Barcelona, Girona and Ausona from 945 and count of Urgell from 948. Borrell was first seen acting as count during the reign of his father Sunyer II in 945 at the consecration of the nunnery church of Sa ...
(947–992) visited the monastery, and the abbot asked the count to take Gerbert with him so that the lad could study mathematics in
Catalonia Catalonia is an autonomous community of Spain, designated as a ''nationalities and regions of Spain, nationality'' by its Statute of Autonomy of Catalonia of 2006, Statute of Autonomy. Most of its territory (except the Val d'Aran) is situate ...
and acquire there some knowledge of Arabic learning. While away from the monastery, Gerbert pursued studies in Barcelona, and also received Arabic instruction at
Seville Seville ( ; , ) is the capital and largest city of the Spain, Spanish autonomous communities of Spain, autonomous community of Andalusia and the province of Seville. It is situated on the lower reaches of the Guadalquivir, River Guadalquivir, ...
and Córdoba.


Scholarly work

Gerbert studied under the direction of Bishop Atto of Vich, some 60 km north of Barcelona, and probably also at the nearby Monastery of Santa Maria de Ripoll. Like all Catalan monasteries, it contained manuscripts from
Muslim Spain Al-Andalus () was the Muslim-ruled area of the Iberian Peninsula. The name refers to the different Muslim states that controlled these territories at various times between 711 and 1492. At its greatest geographical extent, it occupied most o ...
and especially from Cordoba, one of the intellectual centres of Europe at that time: the library of
al-Hakam II Al-Hakam II, also known as Abū al-ʿĀṣ al-Mustanṣir bi-Llāh al-Hakam b. ʿAbd al-Raḥmān (; 13 January 915 – 1 October 976), was the Caliph of Córdoba. He was the second Umayyad Caliph of Córdoba in Al-Andalus, and son of Abd-al-R ...
, for example, had thousands of books (from science to Greek philosophy). This is where Gerbert was introduced to
mathematics Mathematics is a field of study that discovers and organizes methods, Mathematical theory, theories and theorems that are developed and Mathematical proof, proved for the needs of empirical sciences and mathematics itself. There are many ar ...
and
astronomy Astronomy is a natural science that studies celestial objects and the phenomena that occur in the cosmos. It uses mathematics, physics, and chemistry in order to explain their origin and their overall evolution. Objects of interest includ ...
. Borrell II was facing major defeat from the Andalusian powers so he sent a delegation to Córdoba to request a truce. Bishop Atto was part of the delegation that met with al-Ḥakam II, who received him with honour. Gerbert was fascinated by the stories of the
Mozarab The Mozarabs (from ), or more precisely Andalusi Christians, were the Christians of al-Andalus, or the territories of Iberia under Muslim rule from 711 to 1492. Following the Umayyad conquest of the Visigothic Kingdom in Hispania, the Christian ...
Christian bishops and judges who dressed and talked like the Moors, well-versed in mathematics and natural sciences like the great teachers of the Islamic
madrasah Madrasa (, also , ; Arabic: مدرسة , ), sometimes romanized as madrasah or madrassa, is the Arabic word for any type of educational institution, secular or religious (of any religion), whether for elementary education or higher learning ...
s. This sparked Gerbert's veneration for the Moors and his passion for mathematics and astronomy.


Abacus and numerals

Gerbert learned of Hindu–Arabic digits and applied this knowledge to the
abacus An abacus ( abaci or abacuses), also called a counting frame, is a hand-operated calculating tool which was used from ancient times in the ancient Near East, Europe, China, and Russia, until the adoption of the Hindu–Arabic numeral system. A ...
, but probably without the numeral
zero 0 (zero) is a number representing an empty quantity. Adding (or subtracting) 0 to any number leaves that number unchanged; in mathematical terminology, 0 is the additive identity of the integers, rational numbers, real numbers, and compl ...
. According to the 12th-century historian
William of Malmesbury William of Malmesbury (; ) was the foremost English historian of the 12th century. He has been ranked among the most talented English historians since Bede. Modern historian C. Warren Hollister described him as "a gifted historical scholar and a ...
, Gerbert got the idea of the computing device of the abacus from a
Moorish The term Moor is an exonym used in European languages to designate the Muslim populations of North Africa (the Maghreb) and the Iberian Peninsula (particularly al-Andalus) during the Middle Ages. Moors are not a single, distinct or self-defi ...
scholar from
University of Al-Qarawiyyin The University of al-Qarawiyyin (), also written Al-Karaouine or Al Quaraouiyine, is a university located in Fez, Morocco. It was founded as a mosque by Fatima al-Fihri in 857–859 and subsequently became one of the leading spiritual and educ ...
. The
abacus An abacus ( abaci or abacuses), also called a counting frame, is a hand-operated calculating tool which was used from ancient times in the ancient Near East, Europe, China, and Russia, until the adoption of the Hindu–Arabic numeral system. A ...
that Gerbert reintroduced into Europe had its length divided into 27 parts with 9 number symbols (this would exclude zero, which was represented by an empty column) and 1,000 characters in all, crafted out of
animal horn A horn is a permanent pointed projection on the head of various animals that consists of a covering of keratin and other proteins surrounding a core of live bone. Horns are distinct from antlers, which are not permanent. In mammals, true horns ...
by a shieldmaker of Rheims.. According to his pupil Richer, Gerbert could perform speedy calculations with his abacus that were extremely difficult for people in his day to think through using only
Roman numerals Roman numerals are a numeral system that originated in ancient Rome and remained the usual way of writing numbers throughout Europe well into the Late Middle Ages. Numbers are written with combinations of letters from the Latin alphabet, eac ...
. Due to Gerbert's reintroduction, the abacus became widely used in Europe once again during the 11th century. Bernelinus of Paris, who was probably a pupil of Gerbert, wrote a book called the ''Liber Abaci'' (not to be confused with
Fibonacci Leonardo Bonacci ( – ), commonly known as Fibonacci, was an Italians, Italian mathematician from the Republic of Pisa, considered to be "the most talented Western mathematician of the Middle Ages". The name he is commonly called, ''Fibonacci ...
's ''
Liber Abaci The or (Latin for "The Book of Calculation") was a 1202 Latin work on arithmetic by Leonardo of Pisa, posthumously known as Fibonacci. It is primarily famous for introducing both base-10 positional notation and the symbols known as Arabic n ...
'') where he discussed the abacus' design. In this book, he individually introduced the "Hindu-Arabic" symbols the abacus used and related them to the more common Latin numerical nouns. Bernelinus' ''Liber Abaci'' has survived in 11 manuscripts from the 11th and 12th centuries. In two of them, probably the oldest ones, the number 3 is reproduced in a form that differs from the other manuscripts. This symbol is reminiscent of the "Tironian note" for the Latin word "ter" from the Roman shorthand. The reason for this is not known, but it is speculated that Bernelinus did not want to use an "unbeliever" symbol to indicate the number that represents the Holy Trinity.


Armillary sphere and sighting tube

Although lost to Europe since the terminus of the
Greco-Roman The Greco-Roman world , also Greco-Roman civilization, Greco-Roman culture or Greco-Latin culture (spelled Græco-Roman or Graeco-Roman in British English), as understood by modern scholars and writers, includes the geographical regions and co ...
era, Gerbert reintroduced the astronomical
armillary sphere An armillary sphere (variations are known as spherical astrolabe, armilla, or armil) is a model of objects in the sky (on the celestial sphere), consisting of a spherical framework of rings, centered on Earth or the Sun, that represent lines o ...
to Latin Europe via the Islamic civilization of Al-Andalus, which was at that time at the "cutting edge" of civilization. The details of Gerbert's armillary sphere are revealed in letters from Gerbert to his former student and monk Remi of Trèves and to his colleague Constantine, the
abbot Abbot is an ecclesiastical title given to the head of an independent monastery for men in various Western Christian traditions. The name is derived from ''abba'', the Aramaic form of the Hebrew ''ab'', and means "father". The female equivale ...
of Micy, as well as the accounts of his former student and French nobleman Richer, who served as a monk in
Rheims Reims ( ; ; also spelled Rheims in English) is the most populous city in the French department of Marne, and the 12th most populous city in France. The city lies northeast of Paris on the Vesle river, a tributary of the Aisne. Founded by ...
. Richer stated that Gerbert discovered that stars coursed in an oblique direction across the night sky.. Richer described Gerbert's use of the armillary sphere as a visual aid for teaching mathematics and astronomy in the classroom. Historian Oscar G. Darlington asserts that Gerbert's division by 60 degrees instead of 360 allowed the lateral lines of his sphere to equal to six degrees.. By this account, the
polar circle A polar circle is a geographic term for a conditional circular line (arc) referring either to the Arctic Circle or the Antarctic Circle. These are two of the keynote circles of latitude (parallels). On Earth, the Arctic Circle is currentl ...
on Gerbert's sphere was located at 54 degrees, several degrees off from the actual 66° 33'. His positioning of the
Tropic of Cancer The Tropic of Cancer, also known as the Northern Tropic, is the Earth's northernmost circle of latitude where the Sun can be seen directly overhead. This occurs on the June solstice, when the Northern Hemisphere is tilted toward the Sun ...
at 24 degree was nearly exact, while his positioning of the
equator The equator is the circle of latitude that divides Earth into the Northern Hemisphere, Northern and Southern Hemisphere, Southern Hemispheres of Earth, hemispheres. It is an imaginary line located at 0 degrees latitude, about in circumferen ...
was correct by definition. Richer also revealed how Gerbert made the planets more easily observable in his armillary sphere: Richer wrote about another of Gerbert's last armillary spheres, which had sighting tubes fixed on the axis of the hollow sphere that could observe the constellations, the forms of which he hung on iron and copper wires.. This armillary sphere was also described by Gerbert in a letter to his colleague Constantine.. Gerbert instructed Constantine that, if doubtful of the position of the
pole star A pole star is a visible star that is approximately aligned with the axis of rotation of an astronomical body; that is, a star whose apparent position is close to one of the celestial poles. On Earth, a pole star would lie directly overhead when ...
, he should fix the sighting tube of the armillary sphere into position to view the star he suspected was it, and if the star did not move out of sight, it was thus the pole star.. Furthermore, Gerbert instructed Constantine that the north pole could be measured with the upper and lower sighting tubes, the Arctic Circle through another tube, the Tropic of Cancer through another tube, the equator through another tube, and the
Tropic of Capricorn The Tropic of Capricorn (or the Southern Tropic) is the circle of latitude that contains the subsolar point at the December (or southern) solstice. It is thus the southernmost latitude where the Sun can be seen directly overhead. It also reach ...
through another tube.


Scientific library

In late 984, Gerbert sent a letter to abbot Eberhard of Tours concerning the foundation of a large scientific library. He dedicated immense sums of money to establishing the library and purchasing texts from a wide variety of western European authors. He wrote to many monks and abbots in Europe requesting classical literature from their monasteries. Gerbert was also able to acquire some work from earlier era authors such as
Cicero Marcus Tullius Cicero ( ; ; 3 January 106 BC – 7 December 43 BC) was a Roman statesman, lawyer, scholar, philosopher, orator, writer and Academic skeptic, who tried to uphold optimate principles during the political crises tha ...
and
Statius Publius Papinius Statius (Greek language, Greek: Πόπλιος Παπίνιος Στάτιος; , ; ) was a Latin poetry, Latin poet of the 1st century CE. His surviving poetry includes an epic in twelve books, the ''Thebaid (Latin poem), Theb ...
. Two specific requests Gerbert made that documentation exists for are letters sent to Lupitus of Barcelona and Bishop Miró Bonfill of Girona, asking the former for an astrology book and the latter for an arithmetic book. It can be inferred from this that the library contained many volumes of books covering a wide variety of topics, but the exact size and influence the library had is seemingly unknown.


Ecclesiastical career

In 969, Borrell II made a pilgrimage to
Rome Rome (Italian language, Italian and , ) is the capital city and most populated (municipality) of Italy. It is also the administrative centre of the Lazio Regions of Italy, region and of the Metropolitan City of Rome. A special named with 2, ...
, taking Gerbert with him. There Gerbert met
Pope John XIII Pope John XIII (; ca. 930 – 6 September 972) was the bishop of Rome and ruler of the Papal States from 1 October 965 to his death. His pontificate was caught up in the continuing conflict between the Holy Roman emperor, Otto I, and the Roman n ...
and
Emperor Otto I Otto I (23 November 912 – 7 May 973), known as Otto the Great ( ) or Otto of Saxony ( ), was East Francia, East Frankish (Kingdom of Germany, German) king from 936 and Holy Roman Emperor from 962 until his death in 973. He was the eldest son o ...
. The pope persuaded Otto I to employ Gerbert as a tutor for his young son,
Otto II Otto II (955 – 7 December 983), called the Red (), was Holy Roman Emperor from 973 until his death in 983. A member of the Ottonian dynasty, Otto II was the youngest and sole surviving son of Otto the Great and Adelaide of Italy. Otto II was ...
. Some years later, Otto I gave Gerbert leave to study at the cathedral school of Rheims where he was soon appointed a teacher by Archbishop Adalberon in 973. He remained in this position until 989, with the only gap being his time as the head of the monastery of Bobbio from 981 to 983. When Otto II became sole
emperor The word ''emperor'' (from , via ) can mean the male ruler of an empire. ''Empress'', the female equivalent, may indicate an emperor's wife (empress consort), mother/grandmother (empress dowager/grand empress dowager), or a woman who rules ...
in 973, he appointed Gerbert the abbot of the
monastery of Bobbio Bobbio Abbey (Italian: ''Abbazia di San Colombano'') is a monastery founded by Irish Saint Columbanus in 614, around which later grew up the town of Bobbio, in the province of Piacenza, Emilia-Romagna, Italy. It is dedicated to Saint Columbanus. ...
and also appointed him as count of the district, but the abbey had been ruined by previous abbots, and Gerbert soon returned to Rheims. After the death of Otto II in 983, Gerbert became involved in the politics of his time. In 985, with the support of his archbishop, he opposed King
Lothair of France Lothair (; ; 941 – 2 March 986), sometimes called Lothair II,After the emperor Lothair I. IIICounting Lothair II of Lotharingia, who ruled over modern Lorraine and Belgium. or IV,Counting Lothair II of Italy. was the penultimate Carol ...
's attempt to take
Lorraine Lorraine, also , ; ; Lorrain: ''Louréne''; Lorraine Franconian: ''Lottringe''; ; ; is a cultural and historical region in Eastern France, now located in the administrative region of Grand Est. Its name stems from the medieval kingdom of ...
from Emperor
Otto III Otto III (June/July 980 – 23 January 1002) was the Holy Roman emperor and King of Italy from 996 until his death in 1002. A member of the Ottonian dynasty, Otto III was the only son of Emperor Otto II and his wife Theophanu. Otto III was c ...
by supporting
Hugh Capet Hugh Capet (; ; 941 – 24 October 996) was the King of the Franks from 987 to 996. He is the founder of and first king from the House of Capet. The son of the powerful duke Hugh the Great and his wife Hedwige of Saxony, he was elected as t ...
. Hugh became
king of France France was ruled by monarchs from the establishment of the kingdom of West Francia in 843 until the end of the Second French Empire in 1870, with several interruptions. Classical French historiography usually regards Clovis I, king of the Fra ...
, ending the
Carolingian The Carolingian dynasty ( ; known variously as the Carlovingians, Carolingus, Carolings, Karolinger or Karlings) was a Frankish noble family named after Charles Martel and his grandson Charlemagne, descendants of the Arnulfing and Pippinid c ...
line of kings in 987. Adalberon died on 23 January 989.. Gerbert was a natural candidate for his succession, but King Hugh appointed Arnulf, an illegitimate son of King Lothair, instead. Arnulf was deposed in 991 for alleged treason against Hugh, and Gerbert was elected his successor. There was so much opposition to Gerbert's elevation to the See of Rheims, however, that
Pope John XV Pope John XV (, ; died March 996) was the bishop of Rome and ruler of the Papal States from August 985 until his death. A Roman by birth, he was the first pope who canonized a saint. The origins of the investiture controversy stem from John XV's ...
(985–996) sent a legate to France who temporarily suspended Gerbert from his episcopal office. Gerbert sought to show that this decree was unlawful, but a further synod in 995 declared Arnulf's deposition invalid. Gerbert then became the teacher of
Otto III Otto III (June/July 980 – 23 January 1002) was the Holy Roman emperor and King of Italy from 996 until his death in 1002. A member of the Ottonian dynasty, Otto III was the only son of Emperor Otto II and his wife Theophanu. Otto III was c ...
, and
Pope Gregory V Pope Gregory V (; c. 972 – 18 February 999), born Bruno of Carinthia, was the bishop of Rome and ruler of the Papal States from 3 May 996 to his death. A member of the Salian dynasty, he was made pope by his cousin, Emperor Otto III. Family ...
(996–999), Otto III's cousin, appointed him archbishop of Ravenna in 998. With imperial support, Gerbert was elected to succeed Gregory V as
pope The pope is the bishop of Rome and the Head of the Church#Catholic Church, visible head of the worldwide Catholic Church. He is also known as the supreme pontiff, Roman pontiff, or sovereign pontiff. From the 8th century until 1870, the po ...
in 999. Gerbert took the name of Sylvester II, alluding to Sylvester I (314–335), the advisor to Emperor
Constantine I Constantine I (27 February 27222 May 337), also known as Constantine the Great, was a Roman emperor from AD 306 to 337 and the first Roman emperor to convert to Christianity. He played a Constantine the Great and Christianity, pivotal ro ...
(324–337). Soon after he became pope, Sylvester II confirmed the position of his former rival Arnulf as archbishop of Rheims. As pope, he took energetic measures against the widespread practices of
simony Simony () is the act of selling church offices and roles or sacred things. It is named after Simon Magus, who is described in the Acts of the Apostles as having offered two disciples of Jesus payment in exchange for their empowering him to imp ...
and concubinage among the clergy, maintaining that only capable men of spotless lives should be allowed to become bishops. In 1001, the Roman populace revolted, forcing Otto III and Sylvester II to flee to
Ravenna Ravenna ( ; , also ; ) is the capital city of the Province of Ravenna, in the Emilia-Romagna region of Northern Italy. It was the capital city of the Western Roman Empire during the 5th century until its Fall of Rome, collapse in 476, after which ...
. Otto III led two unsuccessful expeditions to regain control of the city and died on a third expedition in 1002. Sylvester II returned to Rome soon after the emperor's death, although the rebellious nobility remained in power, and he died a little later. Sylvester is buried in St. John Lateran.


Legacy

Gerbert of Aurillac was a noted humanist. He read
Virgil Publius Vergilius Maro (; 15 October 70 BC21 September 19 BC), usually called Virgil or Vergil ( ) in English, was an ancient Rome, ancient Roman poet of the Augustan literature (ancient Rome), Augustan period. He composed three of the most fa ...
,
Cicero Marcus Tullius Cicero ( ; ; 3 January 106 BC – 7 December 43 BC) was a Roman statesman, lawyer, scholar, philosopher, orator, writer and Academic skeptic, who tried to uphold optimate principles during the political crises tha ...
and
Boethius Anicius Manlius Severinus Boethius, commonly known simply as Boethius (; Latin: ''Boetius''; 480–524 AD), was a Roman Roman Senate, senator, Roman consul, consul, ''magister officiorum'', polymath, historian, and philosopher of the Early Middl ...
; he studied Latin translations of Porphyry and
Aristotle Aristotle (; 384–322 BC) was an Ancient Greek philosophy, Ancient Greek philosopher and polymath. His writings cover a broad range of subjects spanning the natural sciences, philosophy, linguistics, economics, politics, psychology, a ...
. He had a very accurate classification of the different disciplines of philosophy. He was the first French pope. Gerbert was said to be one of the most noted scientists of his time. Gerbert wrote a series of works dealing with matters of the
quadrivium From the time of Plato through the Middle Ages, the ''quadrivium'' (plural: quadrivia) was a grouping of four subjects or arts—arithmetic, geometry, music, and astronomy—that formed a second curricular stage following preparatory work in th ...
(
arithmetic Arithmetic is an elementary branch of mathematics that deals with numerical operations like addition, subtraction, multiplication, and division. In a wider sense, it also includes exponentiation, extraction of roots, and taking logarithms. ...
,
geometry Geometry (; ) is a branch of mathematics concerned with properties of space such as the distance, shape, size, and relative position of figures. Geometry is, along with arithmetic, one of the oldest branches of mathematics. A mathematician w ...
,
astronomy Astronomy is a natural science that studies celestial objects and the phenomena that occur in the cosmos. It uses mathematics, physics, and chemistry in order to explain their origin and their overall evolution. Objects of interest includ ...
,
music Music is the arrangement of sound to create some combination of Musical form, form, harmony, melody, rhythm, or otherwise Musical expression, expressive content. Music is generally agreed to be a cultural universal that is present in all hum ...
), which he taught using the basis of the
trivium The trivium is the lower division of the seven liberal arts and comprises grammar, logic, and rhetoric. The trivium is implicit in ("On the Marriage of Philology and Mercury") by Martianus Capella, but the term was not used until the Carolin ...
(
grammar In linguistics, grammar is the set of rules for how a natural language is structured, as demonstrated by its speakers or writers. Grammar rules may concern the use of clauses, phrases, and words. The term may also refer to the study of such rul ...
,
logic Logic is the study of correct reasoning. It includes both formal and informal logic. Formal logic is the study of deductively valid inferences or logical truths. It examines how conclusions follow from premises based on the structure o ...
, and
rhetoric Rhetoric is the art of persuasion. It is one of the three ancient arts of discourse ( trivium) along with grammar and logic/ dialectic. As an academic discipline within the humanities, rhetoric aims to study the techniques that speakers or w ...
). In Rheims, he constructed a
hydraulic Hydraulics () is a technology and applied science using engineering, chemistry, and other sciences involving the mechanical properties and use of liquids. At a very basic level, hydraulics is the liquid counterpart of pneumatics, which concer ...
-powered
organ Organ and organs may refer to: Biology * Organ (biology), a group of tissues organized to serve a common function * Organ system, a collection of organs that function together to carry out specific functions within the body. Musical instruments ...
with brass pipes that excelled all previously known instruments,. where the air had to be pumped manually. In a letter of 984, Gerbert asks Lupitus of Barcelona for a book on
astrology Astrology is a range of Divination, divinatory practices, recognized as pseudoscientific since the 18th century, that propose that information about human affairs and terrestrial events may be discerned by studying the apparent positions ...
and
astronomy Astronomy is a natural science that studies celestial objects and the phenomena that occur in the cosmos. It uses mathematics, physics, and chemistry in order to explain their origin and their overall evolution. Objects of interest includ ...
, two terms historian S. Jim Tester says Gerbert used synonymously. Gerbert is sometimes credited with the invention of the first
mechanical clock A clock or chronometer is a device that measures and displays time. The clock is one of the oldest human inventions, meeting the need to measure intervals of time shorter than the natural units such as the day, the lunar month, and the ye ...
in 996, though it was perhaps only an elaborate
water clock A water clock, or clepsydra (; ; ), is a timepiece by which time is measured by the regulated flow of liquid into (inflow type) or out from (outflow type) a vessel, and where the amount of liquid can then be measured. Water clocks are some of ...
, as the verge and foliot does not appear to have been invented until the 13th century. Gerbert may have been the author of a description of the
astrolabe An astrolabe (; ; ) is an astronomy, astronomical list of astronomical instruments, instrument dating to ancient times. It serves as a star chart and Model#Physical model, physical model of the visible celestial sphere, half-dome of the sky. It ...
that was edited by Hermannus Contractus some 50 years later. Besides these, as Sylvester II he wrote a dogmatic treatise, ''De corpore et sanguine Domini''—On the Body and Blood of the Lord.


Legends

The legend of Gerbert grows from the work of the English monk William of Malmesbury in '' De Rebus Gestis Regum Anglorum'' and a polemical pamphlet, ''Gesta Romanae Ecclesiae contra Hildebrandum'', by Cardinal Beno, a partisan of
Emperor Henry IV Henry IV (; 11 November 1050 – 7 August 1106) was Holy Roman Emperor from 1084 to 1105, King of Germany from 1054 to 1105, King of Italy and Burgundy from 1056 to 1105, and Duke of Bavaria from 1052 to 1054. He was the son of Henry III, Holy ...
who opposed
Pope Gregory VII Pope Gregory VII (; 1015 – 25 May 1085), born Hildebrand of Sovana (), was head of the Catholic Church and ruler of the Papal States from 22 April 1073 to his death in 1085. He is venerated as a saint in the Catholic Church. One of the great ...
in the
Investiture Controversy The Investiture Controversy or Investiture Contest (, , ) was a conflict between church and state in medieval Europe, the Church and the state in medieval Europe over the ability to choose and install bishops (investiture), abbots of monasteri ...
. According to the legend, Gerbert traveled to Spain in order to further his knowledge of the lawful arts, as defined by the quadrivium. Gerbert quickly became more knowledgeable than anyone around him in mathematics, astronomy, and astrology. This is the point in William of Malmesbury's testimony where Gerbert is said to have begun learning the dark arts. During Gerberts time in Spain, he was said to live with a Saracen philosopher, who was responsible for giving this knowledge to Sylvester. This knowledge was first obtained through using money and promises as bartering chips for the philosoper's books, which Gerbert translated and learned from. Despite his efforts, there was one book that Gerbert was not able to coax from the philosopher. This book was said to contain all of the knowledge the Saracen philosopher had on the dark arts. After resorting to using wine, and intimacy with his daughter, Gerbert was able to steal the book from under the philosopher's pillow while he slept. Gerbert fled, pursued by the victim, who could trace the thief by the stars, but Gerbert was aware of the pursuit, and hid hanging from a wooden bridge, where, suspended between heaven and earth, he was invisible to the magician. Gerbert was supposed to have built a brazen head. This "robotic" head would answer his questions with "yes" or "no". He was also reputed to have had a
pact Pact, The Pact or PACT may refer to: Entertainment * The Pact (novel), ''The Pact'' (novel), by Jodi Picoult, 1998 * The Pact (2002 film), ''The Pact'' (2002 film), adaptation of Picoult's ''The Pact (novel)#Film adaptation, The Pact'' * The Pac ...
with a female demon called Meridiana, who had appeared after he had been rejected by his earthly love, and with whose help he managed to ascend to the papal throne (another legend tells that he won the papacy playing dice with the Devil). According to the legend, Meridiana (or the bronze head) told Gerbert that if he should ever read a
Mass Mass is an Intrinsic and extrinsic properties, intrinsic property of a physical body, body. It was traditionally believed to be related to the physical quantity, quantity of matter in a body, until the discovery of the atom and particle physi ...
in Jerusalem, the Devil would come for him. Gerbert then cancelled a pilgrimage to Jerusalem, but when he read Mass in the church Santa Croce in Gerusalemme ("Holy Cross of Jerusalem") in Rome, he became sick soon afterwards and, dying, he asked his cardinals to cut up his body and scatter it across the city. In another version, he was even attacked by the Devil while he was reading the Mass, and the Devil mutilated him and gave his gouged-out eyes to demons to play with in the Church. Repenting, Sylvester II then cut off his hand and his tongue. The inscription on Gerbert's tomb reads in part ("This place will yield to the sound f the last trumpetthe limbs of buried Sylvester II, at the advent of the Lord", mis-read as "will make a sound") and has given rise to the curious legend that his bones will rattle in that tomb just before the death of a pope. The story of the crown and
papal legate 300px, A woodcut showing Henry II of England greeting the Pope's legate. A papal legate or apostolic legate (from the ancient Roman title '' legatus'') is a personal representative of the Pope to foreign nations, to some other part of the Catho ...
authority allegedly given to
Stephen I of Hungary Stephen I, also known as King Saint Stephen ( ; ; ; 975 – 15 August 1038), was the last grand prince of the Hungarians between 997 and 1000 or 1001, and the first king of Hungary from 1000 or 1001 until his death in 1038. The year of his bi ...
by Sylvester in the year 1000 (hence the title '
apostolic king His (Royal) Apostolic Majesty was a styled title used by the Kings of Hungary, in the sense of being latter-day apostles of Christianity. First creation The origin of this title dates from around 1000 A.D. when Pope Silvester II conferred it up ...
') is noted by the 19th-century historian Lewis L. Kropf as a possible forgery of the 17th century. Likewise, the 20th-century historian Zoltan J. Kosztolnyik states that "it seems more than unlikely that Rome would have acted in fulfilling Stephen's request for a crown without the support and approval of the
emperor The word ''emperor'' (from , via ) can mean the male ruler of an empire. ''Empress'', the female equivalent, may indicate an emperor's wife (empress consort), mother/grandmother (empress dowager/grand empress dowager), or a woman who rules ...
." Though the testimony of William of Malmesbury did much to discredit and defame Gerbert, there were many important intellectual distinctions made from it. For example, the legend of Gerbert of Aurilac's talking head helped to describe the line between prohibited and permitted knowledge. Gerbert did work in music theory, mathematics, geometry, and several other fields accepted and taught in the quadrivium. All of the works he did related to these subjects were not brought into question and were accepted as well as appreciated. But works done outside of the accepted liberal arts was condemned, including things learned from bird's songs and flight patterns, as well as the necromancy he was rumored to have taken part in.


Honours

Hungary issued a commemorative stamp honouring Pope Sylvester II on 1 January 1938, and France honoured him in 1964 by issuing a postage stamp.


Works

Gerbert's writings were printed in volume 139 of the ''
Patrologia Latina The ''Patrologia Latina'' (Latin for ''The Latin Patrology'') is an enormous collection of the writings of the Church Fathers and other ecclesiastical writers published by Jacques Paul Migne between 1841 and 1855, with indices published betwe ...
''. Darlington notes that Gerbert's preservation of his letters might have been an effort of his to compile them into a textbook for his pupils that would illustrate proper letter writing. His books on mathematics and astronomy were not research-oriented; his texts were primarily educational guides for his students. ;Mathematical writings * ''Libellus de numerorum divisione'' * ''De geometria'' * ''Regula de abaco computi'' * ''Liber abaci'' * ''Libellus de rationali et ratione uti'' ;Ecclesiastical writings * ''Sermo de informatione episcoporum'' * ''De corpore et sanguine Domini'' * ''Selecta e concil. Basol., Remens., Masom., etc.'' ;Letters * ''Epistolae ante summum pontificatum scriptae'' (218 letters, including letters to the emperor, the pope, and various bishops) * ''Epistolae et decreta pontificia'' (15 letters to various abbots and bishops, including Arnulf) ** a dubious letter to Otto III ** five short poems ;Other writings * ''Acta concilii Remensis ad S. Basolum'' * ''Leonis legati epistola ad Hugonem et Robertum reges'' * ''Celebacy for the guarantee of our future''


In popular culture

* Gerbert D'Aurillac appears as an adversary in Deborah Harkness' novel series called the '' All Souls Trilogy''. He is portrayed by
Trevor Eve Trevor John Eve (born 1 July 1951) is an English actor. In 1979, he gained fame as the eponymous lead in the detective series '' Shoestring'' (1979-1980) and is also known for his role as Detective Superintendent Peter Boyd in the long-running B ...
in the trilogy's television adaptation. * Gerbert d'Aurillac is the protagonist of Judith Tarr's 1989 novel ''Ars Magica''. * Gerbert d'Aurillac is referred to in the first chapter of
Mikhail Bulgakov Mikhail Afanasyevich Bulgakov ( ; rus, links=no, Михаил Афанасьевич Булгаков, p=mʲɪxɐˈil ɐfɐˈnasʲjɪvʲɪdʑ bʊlˈɡakəf; – 10 March 1940) was a Russian and Soviet novelist and playwright. His novel ''The M ...
's novel ''The Master and Margarita''. * Legends about Gerbert D'Aurillac as Pope Sylvester II inspired the short story "The Demon Pope" by Richard Garnett, first published in the original, 1888 edition of '' The Twilight of the Gods and Other Tales''. * In
Anatole France (; born ; 16 April 1844 – 12 October 1924) was a French poet, journalist, and novelist with several best-sellers. Ironic and skeptical, he was considered in his day the ideal French man of letters.The Revolt of the Angels ''The Revolt of the Angels'' () is a 1914 novel by Anatole France. Plot ''Revolt'' retells the classic Christian story of the war in Heaven between angels led by the archangel Michael and others led by Satan. The war ends with the defeat and ca ...
'', Nectaire (a fallen angel) speaks of this Gerbert: "We taught them letters and sciences. A mouthpiece of their god, one Gerbert, took lessons in physics, arithmetic, and music with us, and it was said that he had sold us his soul." Then "The successors of the studious Gerbert, not content with the possession of souls (the profits one gains thereby are lighter than air), wished to possess bodies also."


See also

* List of Roman Catholic scientist–clerics * Barcelona astrolabe


Notes


References


Citations


Bibliography

* * * * * . * * * Freudenhammer, Thomas (2021). "Gerbert of Aurillac and the Transmission of Arabic Numerals to Europe - Gerbert von Aurillac Und Die Übermittlung Der Arabischen Ziffern Nach Europa." ''Sudhoffs Archiv'', vol. 105, no. 1, 2021, pp. 3–19.,


Further reading

* Brown, Nancy Marie. ''The Abacus and the Cross: The Story of the Pope Who Brought the Light of Science to the Dark Ages'' (Basic Books; 2010) 310 pages, * * Navari, Joseph V. (1975). "The leitmotiv in the mathematical thought of Gerbert of Aurillac". ''Journal of Medieval History''. 1 (2): 139–150. * * ''A translation of the letters of Gerbert (982–987) with introduction and notes,'' Harriet Pratt Lattin, tr., Columbus, OH, H. L. Hedrick, 1932. * ''Letters of Gerbert, with His Papal Privileges as Sylvester II, Translated with an introduction by Harriet Pratt Lattin,'' Columbia University Press (1961), * ''The Peasant Boy who Became Pope: Story of Gerbert,'' Harriet Pratt Lattin, Henry Schuman, 1951. * ''The Policy of Gerbert in the Election of Hugh Capet, 987: Based on a Study of His Letters,'' Harriet Pratt Lattin, Ohio State University, 1926. * * * * *


External links


Catholic Encyclopedia

Betty Mayfield, "Gerbert d'Aurillac and the March of Spain: A Convergence of Cultures"


lecture by Lynn H. Nelson.

includes four of his letters to
Adelaide of Italy Adelaide of Italy (; 931 – 16 December 999 AD), also called Adelaide of Burgundy, was Holy Roman Empress by marriage to Emperor Otto the Great. She was crowned with him by Pope John XII in Rome on 2 February 962. She was the first empress des ...
. {{DEFAULTSORT:Sylvester 02 940s births 1003 deaths 10th-century mathematicians 10th-century archbishops 10th-century astronomers 10th-century apocalypticists 10th-century French writers 10th-century writers in Latin 10th-century poets 10th-century popes 11th-century archbishops 11th-century French people 11th-century popes Archbishops of Reims Benedictine popes Catholic clergy scientists French popes Medieval French astronomers Medieval French mathematicians People from Cantal Popes 10th-century French philosophers Burials at the Archbasilica of Saint John Lateran