General council

COUNCILS. GENERAL or OECUMENICAL COUNCILS, or SYNODS. Assemblies of Bishops from all parts of the world, to determine some weighty matter of faith or discipline. Of such Councils there have been six received by the whole Catholic Church, but the Roman Church acknowledges several others. Of these six Councils the first four are the most important:—(1) Council of Nice, A.D. 325, summoned by the Emperor Constantine, against the Arian heresy. (2) Council of Constantinople, A.D. 381, summoned by the Emperor Theodosius, against the heresy of Macedonius. (3) Council of Ephesus, A.D. 431, summoned by the Emperor Theodosius the younger, against the Nestorian heresy. (4) Council of Chalcedon, A.D. 451, summoned by the Emperor Marcianus, against the heresy of the Eutychians. The other two generally received Councils are the Second and Third Councils of Constantinople. (See OEcumenical.)

Besides these General  Councils, there are National, Provincial, and Diocesan Councils,