While the doctrines of the undivided Catholic Church embrace teachings and practices never enunciated in any council, the documents promulgated by the fathers of the Seven Ecumenical Councils serve as a nerve-center for Catholic-Orthodoxy.
Council of Nicea I (AD 325)
Council of Constantinople I (AD 381)
Council of Ephesus (AD 431)
Council of Chalcedon (AD 451)
Council of Constantinople II (AD 553)
Council of Constantinople III (AD 680-681)
Council of Nicea II (AD 787)