General Councils of the Church
Jerusalem (Acts 15:2)
- When and where
- 49. 
- Crisis or controversy
- Gentile converts must follow Mosaic Law; "Unless you are circumcised according to the Mosaic practice, you cannot be saved." Acts 15:1 
- Attendees
- "Apostles and presbyters" Acts 15:6, and the following notables:
 Paul and Barnabas,
 Peter, James (Acts 15:6-22)
- Decrees and resolutions
- "It is the decision of the Holy Spirit and of us not to place on you any burden beyond these necessities." Acts 15:28
Nicea I
- When and where
- 325. (Now Iznik, Turkey, 70 miles from Constantinople on the Asiatic shore of the Bosporus) 
- Crisis or controversy
- Christ was a pure creature; made out of nothing; liable to fall; the Son of God by adoption, not by nature: Arianism. 
- Attendees
- 318 bishops, and the following notables:
 Convened: Constantine I, Emperor;
 Eusebius of Caesarea, historian;
 St. Athanasius, theologian;
 Ratified: Silvester I, Pope.
- Decrees and resolutions
- The Nicene Creed; 
 The Consubstaniality of the Word: homousion  with the Father;
 Solved how the date of Easter should be calculated.
Constantinople I
- When and where
- 381. (Now Istanbul, Turkey) 
- Crisis or controversy
- The need to insist on homousion; 
 Demonstrate to the world that Christians of the East are not Arians;
 Apollinaris was teaching that Christ was not true man.
- Attendees
- 186 bishops, and the following notables:
 Convened: Theodosius I, Emperor;
 St. Basil the Great;
 St. Gregory of Nyssa;
 St. Gregory of Naz., theologians;
 Ratified: Damasus, Pope
- Decrees and resolutions
- Renewed the work of Nicaea; 
 Condemned the heresy of the Macedonians (the Holy Spirit was not really God);
 Condemned the heresy of Apollinaris (that Christ was not really a man).
Ephesus
- When and where
- 431. 
- Crisis or controversy
- Nestorius was teaching that Mary was not the mother of God; 
 Proponents of Nestorius began claiming that Christ was actually two separate persons, human and divine.
- Attendees
- 250 bishops, and the following notables:
 Convened: Theodosius II, Emperor;
 St. Cyril of Alexandria;
 St. John Chrysostom;
 Ratified: Celestinus I, Pope.
- Decrees and resolutions
- Condemned Nestorius; 
 Decreed that Mary was also Theotokos, mother of God;
 Declared that Christ is true God and true man, that he has two natures (human and divine) joined in one person.
Chalcedon
- When and where
- 451. (Ancient seaport of Bithynia on the sea of Marmara) 
- Crisis or controversy
- Monophysites were teaching that Christ had a single divine nature and no human nature. 
- Attendees
- 600 bishops, and the following notables:
 Convened: Marcianus, Emperor;
 Ratified: Leo I, Pope.
- Decrees and resolutions
- Condemned Monophysitism; 
 Declared that Christ had two distinct natures and was both true God and true man;
 Promulgated canons of church discipline.
Constantinople II
- When and where
- 553. 
- Crisis or controversy
- Emperor Justinian I wanted the Church to consider the orthodoxy of three Greek theologians: Theodore of Mopsuestia, Theodoret of Cyrrhus,  and Ebas of Edessa. 
- Attendees
- 150 bishops, and the following notables:
 Convened: Justinian I, Emperor;
- Decrees and resolutions
- Condemned the writings of theologians as having been infested with Nestorianism.
Constantinople III
- When and where
- 680. 
- Crisis or controversy
- Monothelism was teaching that Christ did not possess a human will. 
- Attendees
- 174 bishops, and the following notables:
 Convened: Constantine IV, Emperor;
 Ratified: Leo II, Pope.
- Decrees and resolutions
- Condemned Monothelism; 
 Declared that Christ has two wills, human and divine.
Nicaea II
- When and where
- 787. 
- Crisis or controversy
- Iconoclasts taught that using sacred images was idolatry. 
- Attendees
- 390 bishops, and the following notables:
 Convened: Irene, Empress;
 Ratified: Adrian I, Pope.
- Decrees and resolutions
- Condemned Iconoclasts; 
 Declared that sacred images may be honored without idolatry.
 Promulgated canons of church discipline.
Constantinople IV
- When and where
- 870. 
- Crisis or controversy
- Needed to decide the right of Patriarch Photius or the restoration of Ignatius. 
- Attendees
- 102 bishops, and the following notables:
 Convened: Basil, Emperor;
 Ratified: Adrian II, Pope.
- Decrees and resolutions
- Photius was condemned in 27 canons.
Lateran I
- When and where
- 1123. (Basilica in Rome, Italy) 
- Crisis or controversy
- Needed to face the social and religious problems of the day; 
 First ecumenical council in the West.
- Attendees
- 300 bishops, and the following notables:
 Convened: Callistus II, Pope;
 Ratified: Callistus
- Decrees and resolutions
- Promulgated canons of mixed matters.
Lateran II
- When and where
- 1139. 
- Crisis or controversy
- A double papal election and ensuing schism when two rivals claiming to be pope divided the church. 
- Attendees
- 1000 bishops, and the following notables:
 Convened: Innocent II, Pope;
 St. Bernard of Clairvaux
 Ratified: Innocent II.
- Decrees and resolutions
- Took measures against schism of antipope Anacletis II; 
 Promulgated canons of church discipline
Lateran III
- When and where
- 1179. 
- Crisis or controversy
- Reorganization had to be faced; there was the ever-needed pressure to reform; restraint of abuses. 
- Attendees
- More than 300 bishops, and the following notables:
 Convened: Alexander III, Pope;
 Ratified: Alexander III, Pope.
- Decrees and resolutions
- Decreed that papal elections required two-thirds majority of cardinals at the conclave; 
 Promulgated numerous disciplinary canons.
Lateran IV
- When and where
- 1215. 
- Crisis or controversy
- Albigensian heresy: two supreme beings, Evil and Good; Christ did not die; all material things must. 
- Attendees
- 412 bishops; 388 priests, and the following notables:
 Convened: Innocent III, Pope;
 Ratified: Innocent III, Pope.
- Decrees and resolutions
- Declaration of Canon Law: the law of the Church; 
 Decrees against Albegensians and Waldensians.
Lyons I
- When and where
- 1245. (City in E. France) 
- Crisis or controversy
- The difficult and heretical behavior of Emperor Frederick II; 
 The persecution of religion.
- Attendees
- 140 bishops; more than 300 in toto, and the following notables:
 Convened: Innocent IV, Pope;
 Ratified: Innocent IV, Pope.
- Decrees and resolutions
- Excommunication and deposition of Frederick II. 
Lyons II
- When and where
- 1274. 
- Crisis or controversy
- A marked decline of the detachment of the popes from the things of the world; 
 Chronic restiveness of the Greeks toward Roman primacy.
- Attendees
- 500 bishops; 570 priests, and the following notables:
 Convened: Gregory X, Pope;
 St. Thomas Aquinas,
 St. Bonaventure;
 Ratified: Gregory X, Pope.
- Decrees and resolutions
- General reformation of the morals of clergy and bishops; 
 Dogmatic constitution of filioque;
 Profession of faith of Greek Emperor Michael VIII.
Vienne
- When and where
- 1312. (City in E. France near Lyons) 
- Crisis or controversy
- Problems with the religious order of Knights Templars. 
- Attendees
- 122 bishops; 300 abbots, and the following notables:
 Convened: Clemens V, Pope;
 Ratified: Clemens V, Pope.
- Decrees and resolutions
- Templars were suppressed; 
 Canon Law enacted;
 Three definition of dogmas;
 Disciplinary decrees written.
Constance
- When and where
- 1414 - 1418. (City in Germany on Swiss border) 
- Crisis or controversy
- The Great Western Schism: two sets of popes. 
- Attendees
- 32 Cardinals; 183 bishops; 100 abbots; 350 priests, and the following notables:
 Convened: Segismund, Emperor;
 Ratified: Martin V, Pope.
- Decrees and resolutions
- Reformation of the Church; 
 Material organization of religion.
Florence
- When and where
- 1438. (City of N. Italy) 
- Crisis or controversy
- East/West reunion; 
 Constantinople was being threatened by Mohammedans.
- Attendees
- more than 150 bishops, and the following notables:
 Convened: Eugene IV, Pope;
 Ratified: Eugene IV, Pope.
- Decrees and resolutions
- Reunion of oriental churches.
Lateran V
- When and where
- 1512 - 1517. 
- Crisis or controversy
- Needed reform in church administration; 
 Rise of atheistic philosophy;
 Friction between bishops and orders of friars.
- Attendees
- 115 bishops, and the following notables:
 Convened: Julius II, Pope;
 Cajetan;
 Ratified: Leo X, Pope.
- Decrees and resolutions
- Condemned the Averroes philosophy: the soul of man is not immortal; 
 Promulgated reform decrees;
 Established principles of book censorship;
 Rights of bishops defined.
Trent
- When and where
- 1545 - 1563. (in Hapsburg's Germany; now N. Italy) 
- Crisis or controversy
- Martin Luther; 
 Revolt against the Pope;
 Widespread heresy.
- Attendees
- 70 - 252 bishops, and the following notables:
 Convened: Paul III, Pope;
 Ratified: Pius IV, Pope.
- Decrees and resolutions
- Doctrinal decrees: restatement of belief in opposition to the new theologies; 
 The Catholic Reformation: the reformation of Catholic life.
Vatican I
- When and where
- 1870. (St. Peter's Bascilica) 
- Crisis or controversy
- A return to life of the Catholic Church: needed a revival of religious life 
 General restoration and restatement of the faith was needed;
 Christian marriages and education needed safeguarding.
- Attendees
- 747 bishops, and the following notables:
 Convened: Pius IX, Pope;
 Ratified: Pius IX, Pope.
- Decrees and resolutions
- Promulgated decrees on the Catholic Faith and on the Church; 
 Condemned the Rationalists and Semirationalists;
 Defined the charism of infallibility.
Vatican II
- When and where
- 1962 - 1965. 
- Crisis or controversy
- Constant need for reform and revival; 
 Needed translation of faith into modern era: communication media;
 Christians and Jews; religious freedom, etc.
- Attendees
- 2908 bishops, and the following notables:
 Convened: John XXIII, Pope;
 Ratified: Paul VI, Pope.
- Decrees and resolutions
- Issued 16 documents: 
 On Divine Revelation;
 The Pastoral Constitution;
 On The Church in the Modern  World;
 On The Church
 
 
 
 
 
 
 
By Paul Flanagan and Robert Schihl.
Catholic Biblical Apologetics, © Copyright 1985-1997, Paul Flanagan and Robert Schihl
Unless otherwise noted, all Scripture texts are taken from the New American Bible with Revised New Testament, © 1986, Confraternity of Christian Doctrine.
Email comments to pdflan@mindspring.com
Last Updated: January 3, 1997