Naples, 143 Narses, general of Justinian, 32, 34, 61 Nationalism, a complicating factor in theological controversy, 9; nationalism of the Spanish Church, 73; nationalism and heresy, 110 _Negus_, title of the ruler of Abyssinia, 111 Nerses III., Armenian "Catholicos," 84-5 Nestorians, Nestorianism, 9, 23, 83; missions, 6, 96-8; in Armenia, 95; in Persia, 93-6, 98-9; Nestorianism and Muhammad, 101; Nestorian "Church of the East" 96 Neustria, Western Frankish kingdom, 43, 135-6, 146 Neutra (in modern Hungary), Christian Church at, 127 Nevers, S. Columban at, 56 Nicaea, First General Council (325), 89; Seventh General Council (787), 165 Nicene Creed, 193 Nicephorus I., emperor, 80 Nicephorus, patriarch of Constantinople, 160 Nicetius, bishop of Trier, 47, 86 Nicolas I., pope, 124, 191-6 Nimes, 75, 77, 146 Nisibis, Nestorian school of theology at, 95-6 Nobadae, a people of the Soudan, converted, 111 Nona, bishop of, 125 Normans, 150, 172, 196 Northmen, ravages of, 169; pillage Hamburg, 130; converted, 129-33. _See_ Danes Northumbria, 116-17; schools of, 116, 167. _See_ Deira Norway, conversion of, 121, 131-2 Nubia, missionaries in, 111 Odilo, abbat of Cluny, 174 Odo, S., abbat of Cluny, 163, 171-5 Oecumenical Councils, canons collected, 194; the Eighth disputed, 193-4. _See_ General Councils Oecumenical patriarch, 65-6 Olaf, king of Sweden (in 853), 130 Olaf Trigvason, king of Norway (995-1000), 121, 132-3. Olaf, S., king of Norway (1017-29), 132 Olaf, Norse king of Dublin, 132 Olga, S., a "ruler of Russia," baptized, 126 Omar, Khalif, 101 Ommeyads, dynasty of Khalifs, descended from Omeyya, 156 Orange, synod at (529), 72 Ordination, anointing the hands at, 183 Origen, his doctrines condemned, 16; Origenists, 15-16 Oswald, king of Northumberland, 116 Oswald, bishop of Worcester, 119 Oswiu, king of Northumbria, 117 Otto I., emperor, revives the Empire and reforms the papacy, 197; ecclesiastical policy in Germany and Italy, 198-9; patron of Gerbert, 200; overlord of Poland, 125; Slav missions, 126; intervenes in Bohemia, 129; and Denmark, 131 Otto II., emperor, 199, 201 Otto III., emperor, 125, 198-202 Ouen, S., bishop of Rouen, 58