One of the Fathers of the Greek Church, brother of St. Basil, and bishop of Nyssa, in Cappadocia; he was distinguished for his zeal against the Arians, and was banished from his diocese at the instance of the Emperor Valens, who belonged to that sect, but returned to it after his death; he was an eminent theologian and a valiant defender of orthodoxy, on, according to Harnack, something like Hegelian lines (332-400). Festival, March 9.