St. Gregory was born to a distinguished pagan family at Neocaesarea, Pontus in 213, and studied law there. In about 233, he and his brother, Athenodorus, accompanied his sister, who was joining her husband in Caesarea, Palestine, while they continued on to Beirut to continue their law studies. They met Origen along the way, and instead of going to Beirut, entered his school at Caesarea, where they studied theology, were converted to Christianity by Origen, and became his disciples.
Gregory returned to Neocaesarea around 238, intending to practice law, but was instead elected bishop by the seventeen Christians of the city. It soon became apparent that he was gifted with remarkable powers. He preached eloquently, and converted so many that he was able to build a church, and soon was so reknowned for his miracles that he was surnamed "Thaumaturgus" (the wonder-worker).
He was a much-sought-after arbiter for his wisdom and legal knowledge and ability, and he advised his flock to go into hiding when Decius' persecution of the Christians broke out in 250, and fled to the desert with his deacon. On his return, he ministered faithfully to his flock when the plague struck his See and when the Goths devastated Pontus, 252-254, which he described in his "Canonical Letter."
He participated in the synod of Antioch, 264-265, against Samosata, and fought Sabellianism and Tritheism. It is reported that at his death in 270 at Neocaesarea, only seventeen unbelievers were left in the city.
He is invoked against floods and earthquakes (at one time he reportedly stopped the flooding of Lycus, and at another, he moved a mountain).
According to St. Gregory of Nyssa, Gregory Thaumaturgus experienced a vision of Our Lady, the first such recorded vision. He wrote a panegyric to Origen, a treatise on the Creed, and a dissertation addressed to Theopompus; St. Gregory of Nyssa wrote a panegyric to Gregory Thaumaturgus.
His feast day is Feast day is November 17.
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