GREGORY, Theodorus, surnamed Thaumaturgus on account of his miracles, was the scholar of Origen; and was elected bishop of Neocæsarea, the place of his birth, about the year 240, during his absence. He assisted at the council of Antioch, in 255, against Paulus Samosetanus; and died in 270. He had the satisfaction of leaving only seventeen idolaters in his diocese, where there were but seventeen Christians when he was ordained. There is still extant of his, A gratulatory oration to Origen, A canonical epistle, and some other works.