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When did Euclid live and teach in Alexandria, Egypt?
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Euclid
Euclid, coloured woodcut, 1584. His Elements, a treatise on geometry and mathematics, is one of the most influential books ever written.
Euclid is believed to have flourished around 300 BCE in Alexandria, Egypt. Historical accounts, primarily from the philosopher Proclus, indicate that Euclid taught in Alexandria during the reign of Ptolemy I Soter, who ruled Egypt from 323 to 285 BCE. Beyond this association with the Ptolemaic period, little specific biographical information about his life is known.12