Euclid (c.300 BCE): Greek mathematician, author of the Elements.
The great mathematician Euclid is said to have lived c.300 BCE and was connected to the Museum at Alexandria, a scientific institute in the capital of Egypt created by king Ptolemy I Soter. In the thirteen books of the Elements, Euclid summarized and systematized all mathematic knowledge of his age. He also published works on optics and the theory of music. However, he is best known as a mathematician. No work of ancient art approaches the pure and surprising beauty of Euclid's proof that there are infinitely many prime numbers.