Avicenna or Ibn Sina
AVICENNA or IBN SINA (980?-1037) often called Prince of Physicians, was born in Afshena, Persia, the son of a tax collector. He was very precocious, and when he was only 18, his fame as a physician was so great that he was summoned to treat the prince Nuh Ibn Mansur. His therapy was successful, and he became more famous. He wrote poetry as well as books on all the sciences.
He is especially remembered for his great Canon (Al Qaniun) the most famous medical textbook ever written, and used longer than any other work. Five hundred years after it was written, the Canon was a required textbook at the University of Vienna.