The Seven Ecumenical Councils

The Seven Ecumenical Councils, occurring before the the Great Schism dividing the Church East from West, represent the teaching of the Undivided Church and therefore when combined with the teachings of the Bible represent the true Catholic Faith.

The First Council of Nicaea (325)
The First Council of Constantinople (381)
The First Council of Ephesus (431)
The Council of Chalcedon (451)
The Second Council of Constantinople (553)
The Third Council of Constantinople (680-681)
The Second Council of Nicaea (787)

Click here for Wikipedia’s short review of the key points of each of the Seven Ecumenical Councils