The emperor, always intent on the advancement of religion, erected the most beautiful temples to God in every place, particularly in metropolises, such as Nicomedia in Bithynia, Antioch on the river Orontes, and Byzantium. He greatly improved this latter city, and constituted it the equal of Rome in power, and participation in the government; for, when he had settled the affairs of the empire according to his own mind, and had rectified foreign affairs by wars and treaties, he resolved upon founding a city which should be called by his own name, and should be equal in celebrity to Rome. With this intention, he repaired to a plain at the foot of Troy, near the Hellespont, above the tomb of Ajax, where, it is said, the Achaians had their naval stations and tents while besieging Troy; and here he laid the plan of a large and beautiful city, and built the gates on an elevated spot of ground, whence they are still visible from the sea to those sailing by. But when he had advanced thus far, God appeared to him by night, and commanded him to seek another spot. Led by the hand of God, he arrived at Byzantium in Thrace, beyond Chalcedon in Bithynia, and here he was desired to build his city and to render it worthy of the name of Constantine. In obedience to the words of God, he therefore enlarged the city formerly called Byzantium, and surrounded it with high walls. He also erected magnificent dwelling houses southward through the regions. Since he was aware that the former population was insufficient for so great a city, he peopled it with men of rank and their households, whom he summoned hither from the elder Rome and from other countries. He imposed taxes to cover the expenses of building and adorning the city, and of supplying its inhabitants with food, and providing the city with all the other requisites. He adorned it sumptuously with a hippodrome, fountains, porticos, and other structures. He named it New Rome and Constantinople, and constituted it the imperial capital for all the inhabitants of the North, the South, the East, and the shores of the Mediterranean, from the cities on the Ister and from Epidamnus and the Ionian gulf, to Cyrene and that part of Libya called Borium.
He constructed another council house which they call senate; he ordered the same honors and festal days as those customary to the other Romans, and he did not fail studiously to make the city which bore his name equal in every respect to that of Rome in Italy; nor were his wishes thwarted; for by the assistance of God, it had to be confessed as great in population and wealth. I know of no cause to account for this extraordinary aggrandizement, unless it be the piety of the builder and of the inhabitants, and their compassion and liberality towards the poor. The zeal they manifested for the Christian faith was so great that many of the Jewish inhabitants and most of the Greeks were converted. As this city became the capital of the empire during the period of religious prosperity, it was not polluted by altars, Grecian temples, nor sacrifices; and although Julian authorized the introduction of idolatry for a short space of time, it soon afterwards became extinct. Constantine further honored this newly compacted city of Christ, named after himself, by adorning it with numerous and magnificent houses of prayer. And the Deity also co-operated with the spirit of the emperor, and by Divine manifestations persuaded men that these prayer houses in the city were holy and salvatory. According to the general opinion of foreigners and citizens, the most remarkable church was that built in a place formerly called Hestiæ. This place, which is now called Michaelium, lies to the right of those who sail from Pontus to Constantinople, and is about thirty-five stadia distant from the latter city by water, but if you make the circuit of the bay, the journey between them is seventy stadia and upwards. This place obtained the name which now prevails, because it is believed that Michael, the Divine archangel, once appeared there. And I also affirm that this is true, because I myself received the greatest benefits, and the experience of really helpful deeds on the part of many others proves this to be so. For some who had fallen into fearful reverses or unavoidable dangers, others with disease and unknown sufferings, there prayed to God, and met with a change in their misfortunes. I should be prolix were I to give details of circumstance and person. But I cannot omit mentioning the case of Aquilinus, who is even at the present time residing with us, and who is an advocate in the same court of justice as that to which we belong. I shall relate what I heard from him concerning this occurrence and what I saw. Being attacked with a severe fever, arising from a yellowish bile, the physicians gave him some foreign drug to drink. This he vomited, and, by the effort of vomiting, diffused the bile, which tinged his countenance with a yellow color. Hence he had to vomit all his food and drink. For a long time he remained in this state; and since his nourishment would not be quiet in him, the skill of the physicians was at a loss for the suffering. Finding that he was already half dead, he commanded his servant to carry him to the house of prayer; for he affirmed earnestly that there he would either die or be freed from his disease. While he was lying there, a Divine Power appeared to him by night, and commanded him to dip his foot in a confection made of honey, wine, and pepper. The man did so, and was freed from his complaint, although the prescription was contrary to the professional rules of the physicians, a confection of so very hot a nature being considered adverse to a bilious disorder. I have also heard that Probianus, one of the physicians of the palace, who was suffering greatly from a disease in the feet, likewise met with deliverance from sickness at this place, and was accounted worthy of being visited with a wonderful and Divine vision. He had formerly been attached to the Pagan superstitions, but afterwards became a Christian; yet, while he admitted in one way or another the probability of the rest of our doctrines, he could not understand how, by the Divine cross, the salvation of all is effected. While his mind was in doubt on this subject, the symbol of the cross, which lay on the altar of this church, was pointed out to him in the Divine vision, and he heard a voice openly declaring that, as Christ had been crucified on the cross, the necessities of the human race or of individuals, whatsoever they might be, could not be met by the ministration of Divine angels or of pious and good men; for that there was no power to rectify apart from the venerated cross. I have only recorded a few of the incidents which I know to have taken place in this temple, because there is not time to recount them all.