Timeline of Christianity
Constantine called the First Council of Nicaea in 325 to unify Christology, also called the first great Christian council by Jerome, the first ecumenical, decreed the Original Nicene Creed, but rejected by Nontrinitarianism such as Arius, Theonas, Secundus, Eusebius of Nicomedia, and Theognis who were excommunicated, also addressed Easter controversy and passed 20 Canon laws.