COUNCIL, in Church History, an assembly of prelates, convened for the purpose of regulating affairs relative to the doctrine and discipline of the church. The exact number of these it is impossible to ascertain. Sir Harris Nicolas estimates them at 1604. The title of Occumencial or general, is given to those which are regarded as representing the universal church. Of these the adherents of the Church of Rome generally acknowledge eighteen as regular and infallible, but differ materially among themselves in regard to the individual councils which are to be included in the list. The Italians, and immediate dependents of the Pope, accept three, viz., those of Lyons, Florence, and the fifth Lateran, which the French deny, and replace by the Councils of Pisa, Constance, and Basle. These rival councils swell the list to twenty-one, which convened as follows:—

Place. Business. Date.
1. Nice (1.), Heresy of Arius, 325
2. Constantinople (1.), Do. Apollinaris, 381
3. Ephesus, Do. Nestorius, 431
4. Chalcedon, Do. Eutyches and Dioscorus, 451
5. Constantinople (2.), Do. Origen and Theodoret, 553
6. Constantinople (3.), Do. Monothelites, 680-1
7. Nice (2.), Regulation of image worship, 787
8. Constantinople (4.), Heresy of Photius, 869
9. Lateran (1.), Right of investiture, 1123
10. Lateran (2.), Temporalities of ecclesiastics, 1139
11. Lateran (3.), The decrees of the antipopes, and suppression of the Vaudois, 1179
12. Lateran (4.), Albigensies and Crusades, 1215
13. Lyons (1.), Excommunication of Frederick II., 1245
14. Lyons (2.), Procession of the Holy Spirit, 1274
15. Vienna, Suppression of Knights Templars, 1311
16. Pisa, Deposition of Benedict XIII., 1409
17. Constance, Condemnation of Wycliffe, Huss, and Jerome, 1414
18. Basle, Reformation of the Clergy, 1431
19. Florence, Schism of the Greeks and Latins, 1439
20. Lateran (5.), Pragmatic sanction; Turkish war, 1512
21. Trent, Condemnation of the Reformers, 1545