Such admirable and wise counsel did the emperor's letter contain. But the evil had become too strong both for the exhortations of the emperor, and the authority of him who was the bearer of his letter: for neither was Alexander nor Arius softened by this appeal; and moreover there was incessant strife and tumult among the people. Moreover another local source of disquietude had pre-existed there, which served to trouble the churches,--the dispute namely in regard to the Passover, which was carried on in the regions of the East only. This arose from some desiring to keep the Feast more in accordance with the custom of the Jews; while others preferred its mode of celebration by Christians in general throughout the world. This difference, however, did not interfere with their communion, although their mutual joy was necessarily hindered. When, therefore, the emperor beheld the Church agitated on account of both of these causes, he convoked a General Council, summoning all the bishops by letter to meet him at Nicæa in Bithynia. Accordingly the bishops assembled out of the various provinces and cities; respecting whom Eusebius Pamphilus thus writes, word for word, in his third book of the life of Constantine: Wherefore the most eminent of the ministers of God in all the churches which have filled Europe, Africa, and Asia, were convened. And one sacred edifice, dilated as it were by God, contained within it on the same occasion both Syrians and Cilicians, Phoenicians, Arabs and Palestinians, and in addition to these, Egyptians, Thebans, Libyans, and those who came from Mesopotamia. At this synod a Persian bishop was also present, neither was the Scythian absent from this assemblage. Pontus also and Galatia, Pamphylia, Cappadocia, Asia and Phrygia, supplied those who were most distinguished among them. Besides, there met there Thracians and Macedonians, Achaians and Epirots, and even those who dwelt still further away than these, and the most celebrated of the Spaniards himself took his seat among the rest. The prelate of the imperial city was absent on account of age; but some of his presbyters were present and filled his place. Such a crown, composed as a bond of peace, the emperor Constantine alone has ever dedicated to Christ his Saviour, as a thank-offering worthy of God for victory over his enemies, having appointed this convocation among us in imitation of the Apostolic Assembly. For among them it is said were convened "devout men of every nation under heaven; Parthians, Medes and Elamites, and those who dwelt in Mesopotamia, Judæa and Cappadocia, Pontus and Asia, Phrygia and Pamphylia, Egypt and the part of Libya which is toward Cyrene, strangers from Rome also, both Jews and proselytes with Cretans and Arabs." That congregation, however, was inferior in this respect, that all present were not ministers of God: whereas in this assembly the number of bishops exceeded three hundred;
Christianity · Church History · Ecclesiastical History
Book I, Ch. 8 — Of the Synod which was held at Nicæa in Bithynia, and the Creed there put forth.
Ecclesiastical History · Socrates Scholasticus