The Seven Ecumenical Councils

Nicaea I (325)
Constantinople I (381)
Ephesus (431)
Chalcedon (451)
Constantinople II (553)
Constantinople III (680-681)
Nicaea II (787)

Local Councils of Universal Authority

Ancyra (314)
Neocaesarea (315)
Gangra (325)
Antioch (341)
Laodicea (343)
Sardica (343)
Carthage (419)
In Trullo (692)