Euclid

Euclid, also known as Euclid of Alexandria or Eukleides, was a Greek mathematician, often referred to as the founder of geometry who flourished during the reign of Ptolemy I Soter.

During his lifetime, Euclid wrote a work on geometry titled Elements, which was considered by Alexandrians as important as Pythagoras' Essence and Source of All Things. It was later inscribed on papyruses and studied by geographers in the Library of Alexandria.