Scientific activity in medieval Europe was maintained by the activity of a number of significant scholars, active in a wide range of scientific disciplines and working in Greek, Latin, and Arabic-speaking cultures. This list provides a brief summary of their work.
Early Middle Ages
Anatolius of Laodicea (early 3rd century – 283), a bishop of Laodicea, one of the foremost scholars of his day in the physical sciences. Nemesius (?-c. 390), a bishop of Emesa whose De Natura Hominis blended theology with Galenic medicine and is notable for his ideas concerning the brain. He also may have anticipated the discovery of the circulatory system. Isidore of Miletus (ca. 442 – ca. 537) was a renowned Byzantine scientist and mathematician. He was one of the two main Byzantine Greek architects (Anthemius of Tralles was the other) that Emperor Justinian I commissioned to design the cathedral Hagia Sophia in Constantinople from 532 to 537. He taught stereometry and physics at the universities, first of Alexandria then of Constantinople, and wrote a commentary on an older treatise on vaulting. Isidore is also renowned for producing the first comprehensive compilation of Archimedes' work, the Archimedes palimpsest. Anthemius of Tralles (ca. 474 – ca. 534), a Byzantine professor of geometry and architecture, authored many influential works on mathematics and was one of the architects of the famed Hagia Sophia, the largest building in the world at its time. His works were among the most important source texts in the Arab world and Western Europe for centuries after. John Philoponus (ca. 490–ca. 570), also known as John the Grammarian, a Christian Byzantine philosopher, launched a revolution in the understanding of physics by critiquing and correcting the earlier works of Aristotle. In the process he proposed important concepts such as a rudimentary notion of inertia and the invariant acceleration of falling objects. Although his works were repressed at various times in the Byzantine Empire, because of religious controversy, they would nevertheless become important to the understanding of physics throughout Europe and the Arab world. Paul of Aegina (ca. 625–ca. 690), considered by some to be the greatest Christian Byzantine surgeon, developed many novel surgical techniques and authored the medical encyclopedia Medical Compendium in Seven Books. The book on surgery in particular was the definitive treatise in Europe and the Islamic world for hundreds of years.
The Venerable Bede (ca. 672–735), a Christian monk of the monasteries of Wearmouth and Jarrow who wrote a work On the Nature of Things, several books on the mathematical / astronomical subject of computus, the most influential entitled On the Reckoning of Time. He made original discoveries concerning the nature of the tides and his works on computus became required elements of the training of clergy, and thus greatly influenced early medieval knowledge of the natural world. Rabanus Maurus (c. 780 – 856), a Christian monk and teacher, later archbishop of Mainz, who wrote a treatise on Computus and the encyclopedic work De universo. His teaching earned him the accolade of "Praeceptor Germaniae," or "the teacher of Germany." Leo the Mathematician (c. 790 – after 869) was a Byzantine philosopher and logician associated with the Macedonian Renaissance. He wrote book-length works, poems, and many epigrams, and was also a compiler, who brought together a wide range of philosophical, medical, and astronomic texts. He composed his own medical encyclopaedia. He was archbishop of Thessalonica and later became the head of the Magnaura School of philosophy in Constantinople, where he taught Aristotelian logic. Abbas Ibn Firnas (810 – 887), a polymath and inventor in Al-Andalus, made contributions in a variety of fields and is most known for his contributions to glass-making and aviation. He developed novel ways of manufacturing and using glass. A 17th century account states he broke his back at an unsuccessful attempt at flying in 875. Pope Sylvester II (c. 946–1003), a Christian scholar, teacher, mathematician, and later pope, reintroduced the abacus and armillary sphere to Western Europe after they had been lost for centuries following the Greco-Roman era. He was also responsible in part for the spread of the Hindu–Arabic numeral system in Western Europe. Maslamah al-Majriti (died 1008), a mathematician, astronomer, and chemist in Al-Andalus, made contributions in many areas, from new techniques for surveying to updating and improving the astronomical tables of al-Khwarizmi and inventing a process for producing mercury oxide. He is most famous, though, for having helped transmit knowledge of mathematics and astronomy to Muslim Spain and Christian Western Europe. Abulcasis (936-1013), a physician and scientist in Al-Andalus, is considered to be the father of modern surgery. He wrote numerous medical texts, developed many innovative surgical instruments, and developed a variety of new surgical techniques and practices. His texts were considered the definitive works on surgery in Europe until the Renaissance.
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