Born at Alexandria, and bishop there; an ecclesiastic of a violent, militant order; persecuted the Novatians, expelled the Jews from Alexandria, quarrelled with the governor, excited a fanaticism which led to the seizure and shameful murder of Hypatia; had a lifelong controversy with Nestorius, and got him condemned by the Council of Ephesus, while he himself was condemned by the Council at Antioch, and both cast into prison; after release lived at peace (376-444). Festival, Jan. 28.