Sacraments; Fasting; Liturgies; Priests; Deacons; Council of Nicaea (1st: 325); Athanasius, Saint, Patriarch of Alexandria, d. 373.; Basil, the Great, saint, Bishop of Caesarea, ca. 329- 379; Patriarchs and patriarchate
Roman Empire; Byzantine Empire; Christianity; Emperors--Byzantine Empire; Diocletian, Emperor of Rome, 245-313; Eusebius, of Caesarea, Bishop of Caesarea, ca. 260- ca. 340; Heresy; Persecution; Arius; Arians; Arianism; Athanasius, Saint, Patriarch...