It was at this period, when Christianity was a great spiritual power, that Constantine arose. He was born at Naissus, in Dacia, A.D. 274, his father being a soldier of fortune, and his mother the daughter of an innkeeper. He was eighteen when his father, Constantius, was promoted by the Emperor Diocletian to the dignity of Caesar,--a sort of lieutenant-emperor,--and early distinguished himself in the Egyptian and Persian wars. He was thirty-one when he joined his father in Britain, whom he succeeded, soon after, in the imperial dignity. Like Theodosius, he was tall, and majestic in manners; gracious, affable, and accessible, like Julius; prudent, cautious, reticent, like Fabius; insensible to the allurements of pleasure, and incredibly active and bold, like Hannibal, Charlemagne, and Napoleon; a politic man, disposed to ally himself with the rising party. The first few years of his reign, which began in A.D. 306, were devoted to the establishment of his power in Britain, where the flower of the Western army was concentrated,--foreseeing a desperate contest with the five rivals who shared between them the Empire which Diocletian had divided; which division, though possibly a necessity in those turbulent times, would yet seem to have been an unwise thing, since it led to civil wars and rivalries, and struggles for supremacy. It is a mistake to divide a great empire, unless mechanism is worn out, and a central power is impossible. The tendency of modern civilization is to a union of States, when their language and interests and institutions are identical. Yet Diocletian was wearied and oppressed by the burdens of State, and retired disgusted, dividing the Empire into two parts, the Eastern and Western. But there were subdivisions in consequence, and civil wars; and had the policy of Diocletian been continued, the Empire might have been subdivided, like Charlemagne's, until central power would have been destroyed, as in the Middle Ages. But Constantine aimed at a general union of the East and West once again, partly from the desire of centralization, and partly from ambition. The military career of Constantine for about seventeen years was directed to the establishment of his power in Britain, to the reunion of the Empire, and the subjugation of his colleagues,--a long series of disastrous civil wars. These wars are without poetic interest,--in this respect unlike the wars between Caesar and Pompey, and that between Octavius and Antony. The wars of Caesar inaugurated the imperial régime when the Empire was young and in full vigor, and when military discipline was carried to perfection; those of Constantine were in the latter days of the Empire, when it was impossible to reanimate it, and all things were tending rapidly to dissolution,--an exceedingly gloomy period, when there were neither statesmen nor philosophers nor poets nor men of genius, of historic fame, outside the Church. Therefore I shall not dwell on these uninteresting wars, brought about by the ambition of six different emperors, all of whom were aiming for undivided sovereignty. There were in the West Maximian, the old colleague of Diocletian, who had resigned with him, but who had reassumed the purple; his son, Maxentius, elevated by the Roman Senate and the Praetorian Guard,--a dissolute and imbecile young man, who reigned over Italy; and Constantine, who possessed Gaul and Britain. In the East were Galerius, who had married the daughter of Diocletian, and who was a general of considerable ability; Licinius, who had the province of Illyricum; and Maximin, who reigned over Syria and Egypt.

The first of these emperors who was disposed of was Maximian, the father of Maxentius and father-in-law of Constantine. He was regarded as a usurper, and on the capture of Marseilles, he under pressure of Constantine committed suicide by strangulation, A.D. 310. Galerius did not long survive, being afflicted with a loathsome disease, the result of intemperance and gluttony, and died in his palace in Nicomedia, in Bithynia, the capital of the Eastern provinces. The next emperor who fell was Maxentius, after a desperate struggle in Italy with Constantine,--whose passage over the Alps, and successive victories at Susa (at the foot of Mont Cenis, on the plains of Turin), at Verona, and Saxa Rubra, nine miles from Rome, from which Maxentius fled, only to perish in the Tiber, remind us of the campaigns of Hannibal and Napoleon. The triumphal arch which the victor erected at Rome to commemorate his victories still remains as a monument of the decline of Art in the fourth century. As a result of the conquest over Maxentius, the Praetorian guards were finally abolished, which gave a fatal blow to the Senate, and left the capital disarmed and exposed to future insults and dangers.

The next emperor who disappeared from the field was Maximin, who had embarked in a civil war with Licinius. He died at Tarsus, after an unsuccessful contest, A.D. 313; and there were left only Licinius and Constantine,--the former of whom reigned in the East and the latter in the West. Scarcely a year elapsed before these two emperors embarked in a bloody contest for the sovereignty of the world. Licinius was beaten, but was allowed the possession of Thrace, Asia Minor, Syria, and Egypt. A hollow reconciliation was made between them, which lasted eight years, during which Constantine was engaged in the defence of his empire from the hostile attacks of the Goths in Illyricum. He gained great victories over these barbarians, and chased them beyond the Danube. He then turned against Licinius, and the bloody battle of Adrianople, A.D. 323, when three hundred thousand combatants were engaged, followed by a still more bloody one on the heights of Chrysopolis, A.D. 324, made Constantine supreme master of the Empire thirty-seven years after Diocletian had divided his power with Maximian.

The great events of his reign as sole emperor, with enormous prestige as a general, second only to that of Julius Caesar, were the foundation of Constantinople and the establishment of Christianity as the religion of the Empire.

The ancient Byzantium, which Constantine selected as the new capital of his Empire, had been no inconsiderable city for nearly one thousand years, being founded only ninety-seven years after Rome itself. Yet, notwithstanding its magnificent site,--equally favorable for commerce and dominion,--its advantages were not appreciated until the genius of Constantine selected it as the one place in his vast dominions which combined a central position and capacities for defence against invaders. It was also a healthy locality, being exposed to no malarial poisons, like the "Eternal City." It was delightfully situated, on the confines of Europe and Asia, between the Euxine and the Mediterranean, on a narrow peninsula washed by the Sea of Marmora and the beautiful harbor called the Golden Horn, inaccessible from Asia except by water, while it could be made impregnable on the west. The narrow waters of the Hellespont and the Bosporus, the natural gates of the city, could be easily defended against hostile fleets both from the Euxine and the Mediterranean, leaving the Propontis (the deep, well-harbored body of water lying between the two straits, in modern times called the Sea of Marmora) with an inexhaustible supply of fish, and its shores lined with vineyards and gardens. Doubtless this city is more favored by nature for commerce, for safety, and for dominion, than any other spot on the face of the earth; and we cannot wonder that Russia should cast greedy eyes upon it as one of the centres of its rapidly increasing Empire. This beautiful site soon rivalled the old capital of the Empire in riches and population, for Constantine promised great privileges to those who would settle in it; and he ransacked and despoiled the cities of Italy, Greece, and Asia Minor of what was most precious in Art to make his new capital attractive, and to ornament his new palaces, churches, and theatres. In this Grecian city he surrounded himself with Asiatic pomp and ceremonies. He assumed the titles of Eastern monarchs. His palace was served and guarded with a legion of functionaries that made access to his person difficult. He created a new nobility, and made infinite gradations of rank, perpetuated by the feudal monarchs of Europe. He gave pompous names to his officers, both civil and military, using expressions still in vogue in European courts, like "Your Excellency," "Your Highness," and "Your Majesty,"--names which the emperors who had reigned at Rome had uniformly disdained. He cut himself loose from all the traditions of the past, especially all relics of republicanism. He divided the civil government of the Empire into thirteen great dioceses, and these he subdivided into one hundred and sixteen provinces. He separated the civil from the military functions of governors. He installed eunuchs in his palace, to wait upon his person and perform menial offices. He made his chamberlain one of the highest officers of State. He guarded his person by bodies of cavalry and infantry. He clothed himself in imposing robes; elaborately arranged his hair; wore a costly diadem; ornamented his person with gems and pearls, with collars and bracelets. He lived, in short, more like a Heliogabalus than a Trajan or an Aurelian. All traces of popular liberty were effaced. All dignities and honors and offices emanated from him. The Caesars had been absolute monarchs, but disguised their power. Constantine made an ostentatious display of his. Moreover he increased the burden of taxation throughout the Empire. The last fourteen years of his reign was a period of apparent prosperity, but the internal strength of the Empire and the character of the emperor sadly degenerated. He became effeminate, and committed crimes which sullied his fame. He executed his oldest son on mere suspicion of crime, and on a charge of infidelity even put to death the wife with whom he had lived for twenty years, and who was the mother of future emperors.

But if he had great faults he had also great virtues. No emperor since Augustus had a more enlightened mind, and no one ever reigned at Rome who, in one important respect, did so much for the cause of civilization. Constantine is most lauded as the friend and promoter of Christianity. It is by his service to the Church that he has won the name of the first Christian emperor. His efforts in behalf of the Church throw into the shade all the glory he won as a general and as a statesman. The real interest of his reign centres in his Christian legislation, and in those theological controversies in which he interfered. With Constantine began the enthronement of Christianity, and for one thousand years what is most vital in European history is connected with Christian institutions and doctrines.

It was when he was marching against Maxentius that his conversion to Christianity took place, A.D. 312, when he was thirty-eight, in the sixth year of his reign. Up to this period he was a zealous Pagan, and made magnificent offerings to the gods of his ancestors, and erected splendid temples, especially in honor of Apollo. The turn of his mind was religious, or, as we are taught by modern science to say, superstitious. He believed in omens, dreams, visions, and supernatural influences.

Now it was in a very critical period of his campaign against his Pagan rival, on the eve of an important battle, as he was approaching Rome for the first time, filled with awe of its greatness and its recollections, that he saw--or fancied he saw--a little after noon, just above the sun which he worshipped, a bright Cross, with this inscription, [Greek: En touto nika]--"In this conquer;" and in the following night, when sleep had overtaken him, he dreamed that Christ appeared to him, and enjoined him to make a banner in the shape of the celestial sign which he had seen. Such is the legend, unhesitatingly received for centuries, yet which modern critics are not disposed to accept as a miracle, although attested by Eusebius, and confirmed by the emperor himself on oath. Whether some supernatural sign really appeared or not, or whether some natural phenomenon appeared in the heavens in the form of an illuminated Cross, it is not worth while to discuss. We know this, however, that if the greatest religious revolution of antiquity was worthy to be announced by special signs and wonders, it was when a Roman emperor of extraordinary force of character declared his intention to acknowledge and serve the God of the persecuted Christians. The miracle rests on the authority of a single bishop, as sacredly attested by the emperor, in whom he saw no fault; but the fact of the conversion remains as one of the most signal triumphs of Christianity, and the conversion itself was the most noted and important in its results since that of Saul of Tarsus. It may have been from conviction, and it may have been from policy. It may have been merely that he saw, in the vigorous vitality of the Christian principle of devotion to a single Person, a healthier force for the unification of his great empire than in the disintegrating vices of Paganism. But, whatever his motive, his action stirred up the enthusiasm of a body of men which gave the victory of the Milvian Bridge. All that was vital in the Empire was found among the Christians,--already a powerful and rising party, that persecution could not put down. Constantine became the head and leader of this party, whose watchword ever since has been "Conquer," until all powers and principalities and institutions are brought under the influence of the gospel. So far as we know, no one has ever doubted the sincerity of Constantine. Whatever were his faults, especially that of gluttony, which he was never able to overcome, he was ever afterwards strict and fervent in his devotions. He employed his evenings in the study of the Scriptures, as Marcus Aurelius meditated on the verities of a spiritual life after the fatigues and dangers of the day. He was not so good a man as was the pious Antoninus, who would, had he been converted to Christianity, have given to it a purer and loftier legislation. It may be doubted whether Aurelius would have made popes of bishops, or would have invested metaphysical distinctions in theology with so great an authority. But the magnificent patronage which Constantine gave to the clergy was followed by greater and more enlightened sovereigns than he,--by Theodosius, by Charlemagne, and by Alfred; while the dogmas which were defended by Athanasius with such transcendent ability at the council where the emperor presided in person, formed an anchor to the faith in the long and dreary period when barbarism filled Europe with desolation and fear.

Constantine, as a Roman emperor, exercised the supreme right of legislation,--the highest prerogative of men in power. So that his acts as legislator naturally claim our first notice. His edicts were laws which could not be gainsaid or resisted. They were like the laws of the Medes and Persians, except that they could be repealed or modified.

One of the first things he did after his conversion was to issue an edict of toleration, which secured the Christians from any further persecution,--an act of immeasurable benefit to humanity, yet what any man would naturally have done in his circumstances. If he could have inaugurated the reign of toleration for all religious opinions, he would have been a still greater benefactor. But it was something to free a persecuted body of believers who had been obliged to hide or suffer for two hundred years. By the edict of Milan, A.D. 313, he secured the revenues as well as the privileges of the Church, and restored to the Christians the lands and houses of which they had been stripped by the persecution of Diocletian. Eight years later he allowed persons to bequeath property to Christian institutions and churches. He assigned in every city an allowance of corn in behalf of charities to the poor. He confirmed the clergy in the right of being tried in their own courts and by their peers, when accused of crime,--a great privilege in the fourth century, but a great abuse in the fourteenth. The arbitration of bishops had the force of positive law, and judges were instructed to execute the episcopal decrees. He transferred to the churches the privilege of sanctuary granted to those fleeing from justice in the Mosaic legislation. He ordained that Sunday should be set apart for religious observances in all the towns and cities of the Empire. He abolished crucifixion as a punishment. He prohibited gladiatorial games. He discouraged slavery, infanticide, and easy divorces. He allowed the people to choose their own ministers, nor did he interfere in the election of bishops. He exempted the clergy from all services to the State, from all personal taxes, and all municipal duties. He seems to have stood in awe of bishops, and to have treated them with great veneration and respect, giving to them lands and privileges, enriching their churches with ornaments, and securing to the clergy an ample support. So prosperous was the Church under his beneficence, that the average individual income of the eighteen hundred bishops of the Empire has been estimated by Gibbon at three thousand dollars a year, when money was much more valuable than it is in our times.