In 431 a great council was convoked at Ephesus, by the emperor Theodosius II. Nestorius, bishop of Constantinople, having violently persecuted all who were not of his opinion on theological points, undergoes persecution in his turn, for having maintained that the Holy Virgin Mary, mother of Jesus Christ, was not mother of God; because said he, Jesus Christ being the word, the Son of God, consubstantial with His Father, Mary could not, at the same time, be mother of God the Father and of God the Son. St. Cyril exclaims loudly against him. Nestorius demands an ecumenical council, and obtains it. Nestorius is condemned; but Cyril is also displaced by a committee of the council. The emperor reverses all that has been done in this council, then permits it to re-assemble. The deputies from Rome arrive very late. The troubles increasing, the emperor has Nestorius and Cyril arrested. At last he orders all the bishops to return, each to his church, and after all no conclusion is reached. Such was the famous Council of Ephesus. In 449 another great council, afterward called "the banditti," met at Ephesus. The number of bishops assembled is a hundred and thirty; and Dioscorus, bishop of Alexandria, presided. There are two deputies from the church of Rome, and several abbots. The question is, whether Jesus Christ has two natures. The bishops and all the monks of Egypt exclaim that "all who would divide Jesus Christ ought themselves to be torn in two." The two natures are anathematized; and there is a fight in full council, as at the little Council of Cirta in 355, and at the minor Council of Carthage. In 452, the great Council of Chalcedon was convoked by Pulcheria, who married Marcian on condition that he should be only the highest of her subjects. St. Leo, bishop of Rome, having great influence, takes advantage of the troubles which the quarrel about the two natures has occasioned in the empire, and presides at the council by his legates--of which we have no former example. But the fathers of the council, apprehending that the church of the West will, from this precedent, pretend to the superiority over that of the East, decide by their twenty-eighth canon, that the see of Constantinople, and that of Rome, shall enjoy alike the same advantages and the same privileges. This was the origin of the long enmity which prevailed, and still prevails, between the two churches. This Council of Chalcedon established the two natures in one only person. Nicephorus relates that, at this same council, the bishops, after a long dispute on the subject of images, laid each his opinion in writing on the tomb of St. Euphemia, and passed the night in prayer. The next morning the orthodox writings were found in the saint's hand, and the others at her feet.