This practice of judging and condemning opinions gave power in the Church to men who would otherwise have been least entitled to weight and influence. Athanasius rose to his high rank over the heads of the elder presbyters by his fitness for the harsher duties then required of an archbishop. Theological opinions became the watchwords of two contending parties; religion lost much of its empire over the heart; and the mild spirit of Christianity gave way to angry quarrels and cruel persecutions.
Another remarkable event of this reign was the foundation of the new city of Constantinople, to which the emperor removed the seat of his government. Rome lost much by the building of the new capital, although the emperors had for some time past ceased to live in Italy; but Alexandria lost the rank which it had long held as the centre of Greek learning and Greek thought, and it felt a blow from which Rome was saved by the difference of language. The patriarch of Alexandria was no longer the head of Greek Christendom. That rank was granted to the bishop of the imperial city; many of the philosophers who hung round the palace at Constantinople would otherwise have studied and taught in the museum; and the Greeks, by whose superiority Egypt had so long been kept in subjection, gradually became the weaker party. In the opinion of the historian, as in the map of the geographer, Alexandria had formerly been a Greek state on the borders of Egypt; but since the rebellion in the reign of Diocletian it was becoming more and more an Egyptian city; and those who in religion and politics thought and felt as Egyptians soon formed the larger half of the Alexandrians. The climate of Egypt was hardly fitted for the Greek race. Their numbers never could have been kept up by births alone, and they now began to lessen as the attraction to newcomers ceased. The pure Greek names henceforth become less common; and among the monks and writers we now meet with those named after the old gods of the country.
Constantine removed an obelisk from Egypt for the ornament of his new city, and he brought down another from Heliopolis to Alexandria; but he died before the second left the country, and it was afterwards taken by his son to Rome. These obelisks were covered with hieroglyphics, as usual, and we have a translation said to be made from the latter by Hermapion, an Egyptian priest. In order to take away its pagan character from the religious ceremony with which the yearly rise of the Nile wras celebrated in Alexandria, Constantine removed the sacred cubit from the temple of Serapis to one of the Christian churches; and nothwithstanding the gloomy forebodings of the people, the Nile rose as usual, and the clergy afterwards celebrated the time of its overflow as a Christian festival.
The pagan philosophers under Constantine had but few pupils and met with but little encouragement. Alypius of Alexandria and his friend Iamblichus, however, still taught the philosophy of Ammonius and Plotinus. The only writings by Alypius now remaining are his Introduction to Music; in which he explains the notation of the fifteen modes or tones in their respective kinds of diatonic, chromatic, and enharmonic. His signs are said to be Pythagorean. They are in pairs, of which one is thought to represent the note struck on the lyre, and the other the tone of the voice to be sung thereto. They thus imply accord or harmony. The same signs are found in some manuscripts written over the syllables of ancient poems; and thereby scholars, learned at once in the Greek language, in the art of deciphering signs, and in the science of music, now chant the odes of Pindar in strains not dissimilar to modern cathedral psalmody.
Sopator succeeded Iamblichus as professor of platonism in Alexandria, with the proud title of successor to Plato, For some time he enjoyed the friendship of Constantine; but, when religion made a quarrel between the friends, the philosopher was put to death by the emperor. The pagan account of the quarrel was that, when Constantine had killed his son, he applied to Sopator to be purified from his guilt; and when the platonist answered that he knew of no ceremony that could absolve a man from such a crime, the emperor applied to the Christians for baptism. This story may not be true, and the ecclesiastical historian remarks that Constantine had professed Christianity several years before the murder of his son; but then, as after his conversion he had got Sopator to consecrate his new city with a variety of pagan ceremonies, he may in the same way have asked him to absolve him from the guilt of murder.
On the death of Constantine, in 337, his three sons, without entirely dismembering the empire, divided the provinces of the Roman world into three shares. Constantine II., the eldest son, who succeeded to the throne of his father in Constantinople, and Constans, the youngest, who dwelt in Rome, divided Europe between them; while Constantius, the second son, held Syria, Mesopotamia, Armenia, and Egypt, of which possessions Antioch on the Orontes was at that time the capital. Thus Alexandria was doomed to a further fall. When governed by Rome it had still been the first of Greek cities; afterwards, when the seat of the empire was fixed at Constantinople, it became the second; but on this division of the Roman world, when the seat of government came still nearer to Egypt, and Antioch rose as the capital of the East, Alexandria fell to be the third among Greek cities. Egypt quietly received its political orders from Antioch. Its opinions also in some cases followed those of the capital, and it is curious to remark that the Alexandrian writers, when dating by the era of the creation, were now willing to consider the world ten years less old than they used, because it was so thought at Antioch. But it was not so with their religious opinions, and as long as Antioch and its emperor undertook to govern the Egyptian church there was little peace in the province.
The three emperors did not take the same side in the quarrel which under the name of religion was then unsettling the obedience of the Egyptians, and even in some degree troubling the rest of the empire. Constantius held the Arian opinions of Syria; but Constantine II. and Constans openly gave their countenance to the party of the rebellious Athanasius, who under their favour ventured to return to Alexandria, where, after an absence of two years and four months, he was received in the warmest manner by his admiring flock. But on the death of Constantine II., who was shortly afterwards killed in battle by his brother Constans, Constantius felt himself more master of his own kingdom; he deposed Athanasius, and summoned a council of bishops at Antioch to elect a new patriarch of Alexandria. Christian bishops, though they had latterly owed their ordination to the authority of their equals, had always received their bishoprics by the choice of their presbyters or of their flocks; and though they were glad to receive the support of the emperor, they were not willing to acknowledge him as their head. Hence, when the council at Antioch first elected Eusebius of Æmisa into the bishopric of Alexandria, he chose to refuse the honour which they had only a doubtful right to bestow, rather than to venture into the city in the face of his popular rival. The council then elected Gregory, whose greater courage and ambition led him to accept the office.
The council of Antioch then made some changes in the creed. A few years later, a second council met in the same place, and drew up a creed more near to what we now call the Athanasian; but it was firmly rejected by the Egyptian and Roman churches. Gregory was no sooner elected to the bishopric than he issued his commands as bishop, though, if he had the courage, he had not at the time the power to enter Alexandria. But Syrianus, the general of the Egyptian troops, was soon afterwards ordered by the emperor to place him on his episcopal throne; and he led him into the city, surrounded by the spears of five thousand soldiers, and followed by the small body of Alexandrians that after this invasion of their acknowledged rights still called themselves Arians. Gregory entered Alexandria in the evening, meaning to take his seat in the church on the next day; but the people in their zeal did not wait quietly for the dreaded morning. They ran at once to the church, and passed the night there with Athanasius in the greatest anxiety. In the morning, when Gregory arrived at the church, accompanied with the troops, he found the doors barricaded and the building full of men and women, denouncing the sacrilege, and threatening resistance. But the general gave orders that the church should be stormed, and the new bishop carried in by force of arms; and Athanasius, seeing that all resistance was useless, ordered the deacons to give out a psalm, and they all marched out at the opposite door singing. After these acts of violence on the part of the troops, and of resistance on the part of the people, the whole city was thrown into an uproar, and the prefect was hardly strong enough to carry on the government; the regular supply of grain for the poor citizens of Alexandria, and for Constantinople, was stopped; and the blame of the whole thrown upon Athanasius. He was a second time obliged to leave Egypt, and he fled to Rome, where he was warmly received by the Emperor Constans and the Roman bishop. But the zeal of the Athanasian party would not allow Gregory to keep possession of the church which he had gained only by force; they soon afterwards set fire to it and burned it to the ground, choosing that there should be no church at all rather than that it should be in the hands of the Arians; and the Arian clergy and bishops, though supported by the favour of the emperor and the troops of the prefect, were everywhere throughout Egypt driven from their churches and monasteries. During this quarrel it seems to have been felt by both parties that the choice of the people, or at least of the clergy, was necessary to make a bishop, and that Gregory had very little claim to that rank in Alexandria. Julius, the Bishop of Rome, warmly espoused the cause of Athanasius, and he wrote a letter to the Alexandrian church, praising their zeal for their bishop, and ordering them to re-admit him to his former rank, from which he had been deposed by the council of Antioch, but to which he had been restored by the Western bishops. Athanasius was also warmly supported by Constans, the emperor of the West, who at the same time wrote to his brother Constantius, begging him to replace the Alexandrian bishop, and making the additional threat that if he would not reinstate him he should be made to do so by force of arms.