'Amr ibn al-'As; Arab Conquest of Egypt; Arabs; Asceticism; Alexandria; Cairo (Egypt); Byzantine Empire; Coptic Church; Heraclius, Emperor of the East, ca. 575-641; History; Chalcedonian Church; Melchite Church; Orthodoxy
Roman Catholic Church; Rome; Istanbul (Turkey); Schism, Acacian, 484-519; Alexandria (Egypt); Timothy Aelurus, Patriarch of Alexandria, d. 477; Theology; Politics; Patriarchs and patriarchate; Coptic Church; Copts; Roman Empire; Excommunication