"The mathematician and philosopher Hypatia of Alexandria was the daughter of the mathematician Theon Alexandricus (ca. 335–405) [the] last librarian of the Library of Alexandria. Around AD 400, she became head of the Platonist school at Alexandria. She taught philosophy and astronomy. The pupils included pagans, Christians, and foreigners. Murdered by a Christian mob after being accused of witchcraft and godlessness and of causing religious turmoil."