he Scot
Sebert, king of the East Saxons, 176
Seleucia, see of, 93
Semi-Pelagianism, 72, 81
Septimania, 77, 146
Serbia, Church of, 124
Serbian Church, 23, 84
Sergius I., pope, 91
Sergius I., patriarch of Constantinople, 83, 87
Sermons, 64-5, 120, 163, 185, 188
Severus, Monophysite patriarch of Antioch, 10, 15, 86
Severus, patriarch of Aquileia, 62
Sigambrians, a Teutonic tribe, allied to the Franks, 43
Sigebert (Sigibert), Frankish king of Austrasia, 43, 54, 75
Silvester II., pope, 7, 125, 200-2
Simplicius, pope, 8
Siricius, pope, 195
Slaves, slavery, 130; freed by Gregory the Great, 65; Jews
enslaved in Spain, 77
Slavs, 44, 84; Charles the Great allied with heathen, 141;
conversion of, 123-9; attacked by Otto I., 197
Smbat, supposed author of the Paulician _Key of Truth_, 80
Soissons, 139, 195
Sophia, S., the Church of the Divine Wisdom, at Constantinople,
25-7; Church of, at Kiev, 127
Sophronius, patriarch of Jerusalem, 87
Soracte, monastery, 145
Spain, 172, 196; Gregory the Great active in, 65; invaded by
the Franks, 74; Dagobert I. influential in, 44; Charles the
Great in, 140; conflict of Arianism and Catholicism in,
48; Catholicism wins, 62-3, 73, 75; conquered by the
Muhammadans, 77-8; Church has to contend with Islam, 72;
Catholicism survives in the North, 78; Eucharist, 179; Spanish
rite, 183; literature, 73
Squillace, monastery, 38-9
Stephen II. (or III.), pope, 148-9
Stephen III. (or IV.), pope, 151
Stephen, king of Hungary, 201
Strathclyde, early British Church of, 113
Studium, the, monastery at Constantinople, 161-3
_Stylites_, 25
Subiaco, S. Benedict at, 35
Suevi (a Teutonic confederate people) in Gaul, 41. _See_ Mir,
Remismond
Sweden, missions to, 129-30
Syagrius, bishop of Autun, 49, 67 n.
Symmachus, Senator, father-in-law of Boethius, executed, 32
_Syntagma_, a collection of canons, compiled, 85, 178
Syria, 100-1, 156; Syrian Church, Monophysite and Nestorian, 9;
National Church, 13; monks disregard the Fifth General
Council, 20; Jacobites in, 23, 84; Adoptianism in, 79;
Monophysitism, 110; Monothelitism, 89; Muhammadan invasion, 108

Tarasius, patriarch of Constantinople, 164
Tartars, 96-7
Tauresium, 91. _See_ Justiniana Prima
Tebessa (in modern Algeria), monastery, 106
Thaddeus, Studite monk, 162
Theandric energy, 87, 89
Theodebert I., Fra