Theon was a Greek scholar in Alexandria, Egypt, and the last director of the Library of Alexandria before it was burnt and destroyed by Christian riots, in the "Museion" until it was closed by the patriarch Theophilus on order of the Christian Roman emperor Theodosius I in 391 AD. Theon was the father of the mathematician and pagan martyr Hypatia who was murdered by Christians. Theon's most durable achievement may be his edition of Euclid's "Elements", … Wikipedia
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