 Ammonius established the tradition of Aristotelian commentary in Alexandria. He was followed in this by his students Asclepius, Philoponus (ca. 490–570), Simplicius (writing after 529 after moving to the Athenian school and moving with it from Athens to Persia after the school’s closure under Justinian), and Olympiodorus (495/505-after 565). The tradition continues through the Christian commentators Elias (probably a pupil of Olympiodorus), David, Ps.-Elias and Stephanus (fl. ca. 610).