# Euclid 323-285 B.C.

From PLANTFACTS.OSU.EDU

**Euclid** was an eminent mathematician who founded a school of Mathematics at Alexandria during the reign of Ptolemy I. His greatest work was the Elements of Geometry which remained in use practically unchanged for 2,000 years.

Source: http://www-groups.dcs.st-andrews.ac.uk/~history/

Source: http://www.ibiblio.org/expo/vatican.exhibit/exhibit/Main_Hall.html