But this did not produce any material change, for _Socrates_, a writer of the fifth century, who resided at Constantinople, makes the following remarks upon the celebration of the Sabbath at the time he wrote, A. D. 440. He says, "There are various customs concerning assembling; for though all the churches throughout the whole world celebrate the sacred mysteries on the Sabbath day, yet the Alexandrians and the Romans, from an ancient tradition, refuse to do this; but the Egyptians who are in the neighborhood of Alexandria, and those inhabiting Thebais, indeed have assemblies on the Sabbath, but do not participate in the mysteries, as is the custom of the Christians. At Cæsarea, Cappadocia, and in Cyprus, on the Sabbath and Dominical day, at twilight, with lighted lamps, the presbyters and bishops interpret the Scriptures. At Rome they fast every Sabbath." This account of the manner of celebrating the Sabbath in the fifth century, is corroborated by _Sozomen_, in his Ecclesiastical History, b. 7, c. 9. He says, "At Constantinople, and almost among all, the Christians assembled upon the Sabbath, and also upon the first day of the week, excepting at Rome and Alexandria; the ecclesiastical assemblies at Rome were not upon the Sabbath, as in almost all other churches of the rest of the world; and in many cities and villages in Egypt, they used to commune in the evening of the Sabbath, on which day there were public assemblies." In regard to fasting on the Sabbath at Rome, referred to by Socrates, it ought to be said, that from the earliest times to the fourth century, the practice had been to observe the Sabbath as a holiday. But the Church of Rome, in its opposition to the Jews, made it a fast day, that the separation might be marked and strong. In the eastern churches they never fasted upon the Sabbath, excepting one Sabbath in the year, which was the day before the Passover. But in the western churches they celebrated a fast every week. It was in reference to this that _Ambrose_ said, "When I come to Rome, I fast upon the Sabbath; when I am here, I do not fast." _Augustine_ also said concerning this, "If they say it is sinful to fast on the Sabbath, then they would condemn the Roman Church, and many places near to and far from it. And if they should think it a sin not to fast on the Sabbath, then they would blame many eastern churches, and the far greater part of the world." This Sabbath fasting was opposed by the eastern church; and in the sixth general council, held at Constantinople, it was commanded that the Sabbath and Dominical days be kept as festivals, and that no one fast or mourn upon them. The practice of fasting, therefore, was chiefly in the western churches, about Rome.