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When was Euclid's Elements written?

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Map of the Greco-Roman world highlighting the birthplaces of notable ancient mathematicians, marked with the pi symbol and labeled with their names. Cities such as Athens, Alexandria, Syracuse, and Miletus are shown around the Mediterranean, with modern country boundaries outlined. An inset provides detail for the region of Greece and western Anatolia. — geometry This map spans a millennium of prominent Greco-Roman mathematicians, from Thales of Miletus (c. 600 bce) to Hypatia of Alexandria (c. 400 ce).

Euclid's Elements was written by the Greek mathematician Euclid, who flourished around 300 BCE in Alexandria, Egypt.12

Rather than being an entirely original work, the Elements represents a comprehensive compilation of mathematical knowledge that had been developed by various predecessors over the two preceding centuries. Euclid is credited with the systematic design and editing of the work, which established a rigorous standard for deductive reasoning and geometric instruction that remained influential for more than 2,000 years.342