Constantine determined to build for his Empire a new capital, which should be worthy of him. He selected the site of BYZANTIUM as offering the greatest advantages; for, being defended on three sides by the sea and the Golden Horn, it could easily be made almost impregnable, while as a seaport its advantages were unrivalled,--a feature not in the least shared by Rome. The project was entered upon with energy; the city was built, and named CONSTANTINOPLE. To people it, the seat of government was permanently removed thither, and every inducement was offered to immigration. Thus was born the GREEK EMPIRE, destined to drag out a miserable existence for nearly a thousand years after Rome had fallen a prey to the barbarians. Its founder died, after a reign of thirty years, in his sixty-fourth year (337). Constantine is entitled to great credit for the uniform kindness with which he treated his Christian subjects. It is said that his mother, HELENA, was a Christian, and that it was to her influence that this mildness was due. The sect, notwithstanding many persecutions, had kept on increasing, until now we find them a numerous and quite influential body. It was during his reign that the DECREE OF MILAN was issued, in 313, giving the imperial license to the religion of Christ; and also in this reign the famous COUNCIL OF NICE, in Bithynia (325), met to settle questions of creed. In person Constantine was tall and majestic: he was dexterous in all warlike accomplishments; intrepid in war, affable in peace; patient and prudent in council, bold and unhesitating in action. Ambition alone led him to attack the East; and the very madness of jealousy marked his course after his success. He was filial in his affection towards his mother; but he can scarcely be called affectionate who put to death his father-in-law, his brother-in-law, his wife, and his son. If he was great in his virtues, in his faults he was contemptible. DECLINE OF THE EMPIRE. Constantine was succeeded by his three sons, CONSTANTINE II., CONSTANTIUS, and CONSTANS, who divided the Empire among themselves (337-353). Constantine and Constans almost at once quarrelled over the possession of Italy, and the difficulty was ended only by the death of the former. The other two brothers lived in harmony for some time, because the Persian war in the East occupied Constantius, while Constans was satisfied with a life of indolence and dissipation. Constans was murdered in 350, and his brother was sole Emperor. He died ten years later, and was succeeded by his cousin, Julian (360-363)