Church Father. He was converted to Christianity by Origen in Caesarea. Soon after his return to Neocaesarea in Pontus, his native city, he became its bishop. In 264–5 he took part in the first Synod of Antioch against Paul of Samosata; he also fought against Sabellianism and tritheism. The wealth of miracles attributed to him, and to which he owes his surname of Thaumaturgus or wonder-worker, testify to the strength of his character. Only a few of the writings attributed to him are genuine; they include his Ecthesis or Creed and the so-called ‘Canonical Letter’, which contains information on the penitential discipline of the early Church. Feast day, 17 Nov.