Ibn Sina, (980-1037), Iranian Islamic philosopher and physician. Studied medicine and philosophy in Bukhara. At the age of 18 he was rewarded for his medical abilities with the post of court physician to the Samanid ruler of Bukhara. After that he travelled and lectured on astronomy and logic at Jurjan. He spent the last 14 years of his life as a scientific adviser and physician to the ruler of Isfahan. Regarded by Muslims as one of the greatest Islamic philosophers. His work The “Canon of Medicine” was used in the Middle East and in Europe as a textbook.