| First Council of Constantinople | |
| Date | 381 |
| Accepted by | Catholicism, Eastern Orthodoxy, Oriental Orthodoxy, Assyrian Church of the East |
| Previous Council | First Council of Nicaea |
| Next Council | Council of Ephesus |
| Convoked by | Emporer Theodosius I |
| Presided by | Meletius of Antioch, Gregory Nazianzus, and Nectarius |
| Attendance | 150 (no representation of Western Church) |
| Topics of discussion | Arianism, Saberianism, Holy Spirit, successor to Meletius |
| Documents and statements | Niceno-Constantinopolitan Creed, seven canons (three disputed) |
| chronological list of Ecumenical councils | |
The First Council of Constantinople (second ecumenical council) was called by Theodosius I in 381 to confirm the Nicene Creed and deal with other matters of the Arian controversy. Saberians were controversed too. In confirming the Nicene Creed, it also amended it by adding the final section regarding the Holy Spirit.
Meletius of Antioch, Gregory Nazianzus, and Nectarius successively presided. Gregory Nazianzus was made patriarch, but soon resigned, and Nectarius was then put in his place.
Seven canons, four of these doctrinal canons and three disciplinary canons, are attributed to the Council and accepted by both the Eastern Orthodox Church and the Oriental Orthodox Churches; the Roman Catholic Church accepts only the first four.