The Greek city of Alexandria, at the mouth of the Nile, was planned and founded by Alexander the Great in 331 BC, and concentrated in it cultural streams from various places: the mysticism of the East and Greek rationalism, in a rich library, with about 700,000 written rolls (the treasure trove of all human knowledge to date, the richest in the world). Thus, with its schools, Alexandria was a kind of university where the most prominent writers, physicians, scientists, and philosophers of the historical period gathered and worked.[1]