The following outline is provided as an overview of and topical guide to the Catholic Ecumenical Councils.
An ecumenical council is a conference of ecclesiastical dignitaries and theological experts convened to discuss and settle matters of Church doctrine and practice.
First Seven Ecumenical Councils
First Council of Nicaea (325 A.D.) Arianism – the belief that the Son of God did not always exist, but was created by—and is therefore distinct from—God the Father. The First Council of Nicaea declared this belief heretical, as did the First Council of Constantinople. Easter date – the date for celebrating Easter was chosen so as not to conflict or be on the same day as the Jewish Passover. Meletius of Lycopolis – bishop of Lycopolis in Egypt. Founder and namesake of the Melitians, who refused to receive in communion those Christians who had renounced their faith during the persecution and later repented of that choice. Nicene Creed – the declaration of the faith of the church Canon Law – body of laws, regulations, or disciplines made or adopted by ecclesiastical authority. 20 were issued by this Council, including several addressing the primacy of Roman, Antochian, and Alexandrian patriarchs. First Council of Constantinople (381 A.D.) Arianism – the belief that the Son of God did not always exist, but was created by—and is therefore distinct from—God the Father. The First Council of Constantinople declared this belief heretical, as did the First Council of Nicaea. Macedonianism – also known as Pneumatomachi; an anti-Nicene Creed sect which flourished in the countries adjacent to the Hellespont during the latter half of the fourth, and the beginning of the fifth century. They denied the divinity of the Holy Ghost, hence the Greek name Pneumatomachi or 'Combators against the Spirit'. Council of Ephesus (431 A.D.) Nestorius – teachings included rejection of the long-used title of Theotokos ("Mother of God") for the Virgin Mary, and were understood by many to imply that he did not believe that Christ was truly God. The Council formally condemned him and his followers for heresy. Nestorianism – emphasizes the disunion between the human and divine natures of Jesus. Caelestius – major follower of the Christian teacher Pelagius and the Christian doctrine of Pelagianism, which was opposed to Augustine of Hippo and his doctrine in original sin, and was later declared to be heresy. He and his followers were declared heretics during this council. Nicene Creed – the declaration of the faith of the church - confirmed. Departure from the creed decreed as heretical. excommunication – eviction from the church. This was the punishment decreed at this council for those who did not accept Church doctrine The Virgin Mary – Mary, mother of Jesus. This council decreed she is to be called Theotokos (God-bearer) Council of Chalcedon (451 A.D.) Chalcedonian Creed – declares that Jesus Christ is both truly God and truly Man Canon Laws – body of laws, regulations, or disciplines made or adopted by ecclesiastical authority. 27 were issued by this council. Second Council of Constantinople (553 A.D.) Three Chapters – three people and their writings – person and writings of Theodore of Mopsuestia, Certain writings of Theodoret of Cyrus, The letter of Ibas of Edessa to Maris – repudiated as Nestorian Third Council of Constantinople (680-681 A.D.) Monothelitism – teaches that Jesus Christ had two natures but only one will. This council repudiated this belief. Monoenergism – teaches that Jesus had two natures but only one "energy." This council repudiated this belief. Second Council of Nicaea (787 A.D.) Byzantine Iconoclasm – the practice of destroying icons and images. This council repudiated this belief. relics part of the body of a saint or a venerated person, or else another type of ancient religious object, carefully preserved for purposes of veneration or as a tangible memorial. This council decreed that altars must contain a relic. Canon Laws – body of laws, regulations, or disciplines made or adopted by ecclesiastical authority. 22 were issued by this council.
