Since the end of the 19th century, scholars have questioned the traditional explanation of the origin of this creed, which has been passed down in the name of the council, whose official acts have been lost over time. A local council of Constantinople in 382 and the third ecumenical council (Ephesus, 431) made no mention of it, with the latter affirming the 325 creed of Nicaea as a valid statement of the faith and using it to denounce Nestorianism. Though some scholarship claims that hints of the later creed's existence are discernible in some writings, no extant document gives its text or makes explicit mention of it earlier than the fourth ecumenical council at Chalcedon in 451. Many of the bishops of the 451 council themselves had never heard of it and initially greeted it skeptically, but it was then produced from the episcopal archives of Constantinople, and the council accepted it "not as supplying any omission but as an authentic interpretation of the faith of Nicaea". In spite of the questions raised, it is considered most likely that this creed was in fact adopted at the 381 second ecumenical council.
Reading 1, Revelation 11:19; 12:1-6, 10
Psalm, Psalms 34:2-3, 10-11, 12-13, 14-15
Gospel, John 6:51-58
Reading 2, Ephesians 5:15-20