Cappadocian, Mennas, Methodius, Nicephorus, Paul, Photius, Sergius, Tarasius Coptic Church, 9, 23, 84, 101, 110, 112; Copts resist Saracens, 109 Corbie (New Korvey), monastery, on the Weser, 130, 170 Corbinian, S., 135 Corinth, bishops of, 67 Cornwall, early British Church of, 113, 117 Corsica, 151 Cosmas, sixth-century traveller, 97 Councils, valuable work of the, 19. _See_ Aachen, Antioch, Austrasia, Autun, Braga, Chalcedon, Clovesho, Constantinople, Frankfort, General, Gentilly, Hatfield, Macon, Orange, Regensburg, Rome, Toledo, Whitby Cracow, relics at, 125 Creed, at the Council of Chalcedon, 2; proposal to reform, 14; importance of a logically tenable, 19; Pope Leo III. discourages additions to, 81; Athanasian, 81-2; Nicene, 193 Crescentius, John, patrician of Rome, 199 Crete, bishops of, 67 Croatia, Croats, 84, 124 Cross, the Holy, 100-2; tolerated by the iconoclast emperor Leo III., 159; sign of the, in baptism, 177; used by S. Augustine in his mission, 184-5 Crusades, true and false, 197-8 "Culdees," Celtic monks, 119 Cumbria (or Strathclyde), early British Church of, 113 Cuthbert, M., 116, 121, 169 Cuthbert, archbishop of Canterbury, 187 Cyprus, Church of, 21 Cyril, S., patriarch of Alexandria (412-44), opponent of Nestorius, 10, 18, 22 Cyril, S. (Constantine), apostle of the Slavs, 123-4, 126, 128 Czechs, Slav race of Bohemia, 127 Dagobert I., Frankish king, son of Chlothochar II., 44, 58, 145 Danes ravage England and Scotland, 117-19, 121; settle, and are converted, 118; Danish invasions, 122; conversion of Denmark, 129, 131 David, S., 118 Decretals, false, 194-6 Deira, northern kingdom of England, 63 Denmark, conversion of, 129, 131 Desiderius (Didier) of Cahors, S., 58 Dionysius the Areopagite, Platonist so called, 89 Dnyepr (Dnieper), Russian river, baptisms in, 127 Dokkum, S. Boniface martyred at, 139 Donation of Constantine, 154; of Pippin, at Quierzy, 149, 151; of Charles the Great, 151-2 Donatists, 103, 107 Double procession of the Holy Ghost, 76, 80-1, 193-4 Druidism favoured the growth of Christian monasticism, 53 Dublin, conversion of Danes at, 122; Norse king of, 132 Duchesne, Mgr., quoted, 40, 208 Dudden, F. H., quoted, 50, 75 n. Dunstan, S., 115, 119-21 Durham, see of, 121