Vitello ( pl, Witelon; german: Witelo; – 1280/1314) was a

friar A friar is a member of one of the mendicant orders founded in the twelfth or thirteenth century; the term distinguishes the mendicants' itinerant apostolic character, exercised broadly under the jurisdiction of a superior general, from the ol ...

theologian 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 ...

, natural philosopher and an important figure in the history of philosophy in Poland.

Name

Vitello's name varies with some sources. In earlier publications he was quoted as Erazmus Ciolek Witelo, Erazm Ciołek, Vitellio and Vitulon. Today, he is usually referred to by his Latin name Vitello Thuringopolonis, often shortened to Vitello.

Life

Vitello's exact birth-name and birthplace are uncertain. He was most likely born around 1230 in

Silesia Silesia (, also , ) is a historical region of Central Europe that lies mostly within Poland, with small parts in the Czech Republic and Germany. Its area is approximately , and the population is estimated at around 8,000,000. Silesia is split ...

, in the vicinity of

Legnica Legnica (Polish: ; german: Liegnitz, szl, Lignica, cz, Lehnice, la, Lignitium) is a city in southwestern Poland, in the central part of Lower Silesia, on the Kaczawa River (left tributary of the Oder) and the Czarna Woda (Kaczawa), Czarna Woda ...

. His mother came from a Polish knightly house, while his father was a

German German(s) may refer to: * Germany (of or related to) **Germania (historical use) * Germans, citizens of Germany, people of German ancestry, or native speakers of the German language ** For citizens of Germany, see also German nationality law **Ger ...

settler from

Thuringia Thuringia (; german: Thüringen ), officially the Free State of Thuringia ( ), is a state of central Germany, covering , the sixth smallest of the sixteen German states. It has a population of about 2.1 million. Erfurt is the capital and larg ...

. He called himself, in

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 ...

, "''Thuringorum et Polonorum filius''" — "a son of Thuringians and

Poles Poles,, ; singular masculine: ''Polak'', singular feminine: ''Polka'' or Polish people, are a West Slavic nation and ethnic group, who share a common history, culture, the Polish language and are identified with the country of Poland in Ce ...

." He studied at Padua University about 1260, then went on to

Viterbo Viterbo (; Viterbese: ; lat-med, Viterbium) is a city and ''comune'' in the Lazio region of central Italy, the capital of the province of Viterbo. It conquered and absorbed the neighboring town of Ferento (see Ferentium) in its early history. ...

. He became friends with William of Moerbeke, the translator of

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 ...

from Greek language into Latin. Vitello's major surviving work on

optics Optics is the branch of physics that studies the behaviour and properties of light, including its interactions with matter and the construction of instruments that use or detect it. Optics usually describes the behaviour of visible, ultraviole ...

, ''Perspectiva'', completed in about 1270–78, was dedicated to William. In 1284 he described the reflection and

refraction In physics, refraction is the redirection of a wave as it passes from one medium to another. The redirection can be caused by the wave's change in speed or by a change in the medium. Refraction of light is the most commonly observed phenomeno ...

of light.Joe Rosen; Lisa Quinn Gothard.
Encyclopedia of Physical Science
'. Infobase Publishing; 2009. . p. 691.

''Perspectiva''

Vitello's ''Perspectiva'' was largely based on the work of the

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 ...

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 ...

(

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 ...

; d. ca. 1041) and in turn influenced later scientists, in particular

Johannes Kepler Johannes Kepler (; ; 27 December 1571 – 15 November 1630) was a German astronomer, mathematician, astrologer, natural philosopher and writer on music. He is a key figure in the 17th-century Scientific Revolution, best known for his laws ...

. Vitello's treatise in optics was closely linked to the Latin version of Ibn al-Haytham's Arabic opus: '' Kitab al-manazir'' (''The Book of Optics''; ''De aspectibus'' or ''Perspectivae''), and both were printed in the Friedrich Risner edition ''Opticae Thesaurus'' (Basel, 1572). Vitello's ''Perspectiva'', which rested on Ibn al-Haytham's research in optics, influenced also the Renaissance theories of perspective.

Lorenzo Ghiberti Lorenzo Ghiberti (, , ; 1378 – 1 December 1455), born Lorenzo di Bartolo, was an Italian Renaissance sculptor from Florence, a key figure in the Early Renaissance, best known as the creator of two sets of bronze doors of the Florence Baptistery ...

's ''Commentario terzo'' (''Third Commentary'') was based on an Italian translation of Vitello's Latin tract: ''Perspectiva''. Vitello's treatise also contains much material in

psychology Psychology is the scientific study of mind and behavior. Psychology includes the study of conscious and unconscious phenomena, including feelings and thoughts. It is an academic discipline of immense scope, crossing the boundaries betwe ...

, outlining views that are close to modern notions on the

association Association may refer to: *Club (organization), an association of two or more people united by a common interest or goal *Trade association, an organization founded and funded by businesses that operate in a specific industry *Voluntary associatio ...

of ideas and on the subconscious. ''Perspectiva'' also includes Platonic

metaphysical Metaphysics is the branch of philosophy that studies the fundamental nature of reality, the first principles of being, identity and change, space and time, causality, necessity, and possibility. It includes questions about the nature of conscio ...

discussions. Vitello argues that there are intellectual and corporeal bodies, connected by causality (corresponding to the

Idealist In philosophy, the term idealism identifies and describes metaphysical perspectives which assert that reality is indistinguishable and inseparable from perception and understanding; that reality is a mental construct closely connected to ide ...

doctrine of the universal and the actual), emanating from God in the form of Divine Light.

Light Light or visible light is electromagnetic radiation that can be perceived by the human eye. Visible light is usually defined as having wavelengths in the range of 400–700 nanometres (nm), corresponding to frequencies of 750–420 tera ...

itself is, for Vitello, the first of all sensible entities, and his views on light are similar to those held by

Roger Bacon Roger Bacon (; la, Rogerus or ', also '' Rogerus''; ), also known by the scholastic accolade ''Doctor Mirabilis'', was a medieval English philosopher and Franciscan friar who placed considerable emphasis on the study of nature through empiri ...

, though he is closer in this to

's legacy.''Ibid'', El-Bizri, 2005

Other works

In ''Perspectiva'', Vitello refers to other works that he had written. Most of these do not survive, but ''De Natura Daemonum'' and ''De Primaria Causa Paenitentiae'' have been recovered.

Legacy

The

lunar crater Lunar craters are impact craters on Earth's Moon. The Moon's surface has many craters, all of which were formed by impacts. The International Astronomical Union currently recognizes 9,137 craters, of which 1,675 have been dated. History The wor ...

'' Vitello'' is named after him.

Notes

References

Vitello and his thoughts * ''Witelonis Perspectivae Liber Primus: Book I of Vitello's Perspectiva'', edition and English translation by Sabetai Unguru, with introduction and commentary, Warsaw, The Polish Academy of Science Press, Studia Copernicana, vol. XV, 1977. * ''Witelonis Perspectivae Libri Duo - Liber Secundus et Liber Tertius: Books II and III of Vitello's Perspectiva'', edition and English translation by Sabetai Unguru, with introduction and commentary, Warsaw, The Polish Academy of Science Press, Studia Copernicana, vol. XXVII, 1991. * ''Witelonis Perspectivae Liber Quartus: Book IV of Vitello's Perspectiva'', A Critical Edition and English Translation with Introduction, Notes and Commentary by Carl J. Kelso, University of Missouri-Columbia, 2003. * ''Witelonis Perspectivae Liber Quintus: Books V of Vitello's Perspectiva'', edition and English translation by Mark A. Smith of the First Catoptrical Book of Witelo's Perspectiva, with introduction and commentary, Warsaw, The Polish Academy of Science Press, 1983. Studies *

Clemens Baeumker Clemens Baeumker (16 September 1853 – 7 October 1924) was a German historian of philosophy. Baeumker was born in Paderborn to a gymnasium teacher. He studied philosophy, theology, and philology in Paderborn and later at the University of Müns ...

, "''Witelo: Ein Philosoph und Naturforscher des dreizehnten Jahrhunderts''," ''Beiträge zur Geschichte der Philosophie des Mittelalters'', part 3, no. 2, Münster, Aschendorff, 1908. *

Władysław Tatarkiewicz Władysław Tatarkiewicz (; 3 April 1886, Warsaw – 4 April 1980, Warsaw) was a Polish philosopher, historian of philosophy, historian of art, esthetician, and ethicist. Early life and education Tatarkiewicz began his higher education at War ...

, ''Historia filozofii'' (History of Philosophy), 3 vols., Warsaw, Państwowe Wydawnictwo Naukowe, 1978.
Jerzy Burchardt, "The Discovery of the Rainbow in Crystal by Witelo"

External links

Online Galleries, History of Science Collections, University of Oklahoma Libraries
High resolution images of works by and/or portraits of Witelo in .jpg and .tiff format. * Erasmus Ciołek Witelo monument in the Żórawina village, Wrocław County, Lower Silesian Voivodeship, SW Poland

{{Authority control People from Silesia Historians of philosophy Natural philosophers 13th-century philosophers 13th-century mathematicians Catholic clergy scientists 13th-century Polish people Polish Roman Catholic theologians Medieval Polish scientists Polish philosophers Medieval Polish mathematicians 13th-century German scientists German philosophers German physicists Canons of Wrocław 13th-century German writers Medieval German mathematicians 13th-century Latin writers People from Legnica Scholastic philosophers Year of birth uncertain 1280 deaths