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First Council of Constantinople (381)

Ecumenical councils, NPNF II.14

1. Canon 1

Canons of the One Hundred and Fifty Fathers who assembled at Constantinople during the Consulate of those Illustrious Men, Flavius Eucherius and Flavius Evagrius on the VII of the Ides of July.¹

The Bishops out of different provinces assembled by the grace of God in Constantinople, on the summons of the most religious Emperor Theodosius, have decreed as follows:

Canon I

The Faith of the Three Hundred and Eighteen Fathers assembled at Nice in Bithynia shall not be set aside, but shall remain firm. And every heresy shall be anathematized, particularly that of the Eunomians or [Anomæans, the Arians or] Eudoxians, and that of the Semi-Arians or Pneumatomachi, and that of the Sabellians, and that of the Marcellians, and that of the Photinians, and that of the Apollinarians.

Notes · Ancient Epitome of Canon I

Let the Nicene faith stand firm. Anathema to heresy.

Notes

Such is the caption in the old Greek codices. The vij^th of the Ides is July 9th. “From this (says Hefele) we may conclude that this synod which according to Socrates, H. E., v. 8) begun May 381, lasted until July of that year.”