There were three philosopher theologians in the latter half of the fourth century that were mostly responsible for defeating the heresy of Arianism. This heresy denied the true divinity of Jesus Christ by subordinating the Son to the Father. They are Basil the Great, bishop of Caesarea in Cappadocia—in the middle of modern Turkey, his brother Gregory of Nyssa, bishop of Nyssa, also in Cappadocia, and Gregory, bishop of Nazianzus, also Cappadocia, who would become bishop of Constantinople.
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