Arius

Arius (Ancient Greek: Ἄρειος, AD 250 or 256–336) was an ascetic Christian presbyter in Alexandria, Egypt, of the church of Baucalis, and was of Libyan origins. His teachings about the nature of the Godhead, which emphasized the Father's divinity over the Son, and his opposition to Trinitarian Christology, made him a primary topic of the First Council of Nicea, convened by Roman Emperor Constantine in AD 325.