Eastern Orthodoxy. Branch of Christianity. East-West Schism.

Filioque. “and from the son” added to Nicene Creed in 6C, causing East-West Schism.

John V. 1332-91. Byzantine Empire 1341~91. Tried to unite East-West Schism to fight Turks.

Lateran Councils. Roman Catholic church councils. 1123,39 vs Schism of Arnold of Brescia. 1179 Crusade vs Albigens. 1215 Crusade. 1512-17 Reform.

Leo IX, St. 1002-54. Pope 1049-. Excommunicated Cerularius, causing East-West Schism.

Lyons, Council, 2nd. 1274. Union of East, West churches. Later repudiated by Greek clergy. Schism.

Nicene Creed. 325. Tenets of Christian faith. Interpretation of Trinity, adding filioque led to East-West Schism. Nicaea.

Novatian. c200-58. Antipope. Founded strict sect -6C. Novation Schism.

Orthodox Church, Eastern. 1054-. Autonomous Christian churches of Middle East, Eastern Europe, Russia using Byzantine rite. East-West Schism.

Roman Catholic Church. 30-. Branch of Christianity recognizing Pope as successor to St Peter. East-West Schism. Eastern Orthodoxy. Protestantism.

Schism Act. 1714. Occasional Conformity Act 1719.