The facts, therefore, may have been these: Before the battle, Constantine, leaning already toward Christianity as probably the beat and most hopeful of the various religions, seriously sought in prayer, as he related to Eusebius, the assistance of the God of the Christians, while his heathen antagonist, Maxentius, according to Zosimus, was consulting the sibylline books and offering sacrifice to the idols. Filled with mingled fears and hopes about the issue of the conflict, he fell asleep, and saw in a dream the sign of the cross of Christ with a significant inscription and promise of victory. Being already familiar with the general use of this sign among the numerous Christians of the empire, many of whom no doubt were in his own army, he constructed the _labarum_,[A] afterward so called, that is, the sacred standard of the Christian cross with the Greek monogram of Christ,[B] which he had also put upon the shields of the soldiers. To this cross-standard, which now took the place of the Roman eagles, he attributed the decisive victory over the heathen Maxentius. Accordingly, after his triumphal entrance into Rome, he had his statue erected upon the forum with the labarum in his right hand, and the inscription beneath: 'By this saving sign, the true token of bravery, I have delivered your city from the yoke of the tyrant.' Three years afterward the senate erected to him a triumphal arch of marble, which to this day, within sight of the sublime ruins of the pagan Colosseum, indicates at once the decay of ancient art and the downfall of heathenism; as the neighboring arch of Titus commemorates the downfall of Judaism and the destruction of the temple. The inscription on this arch of Constantine, however, ascribes his victory over the hated tyrant, not only to his master mind, but indefinitely also to the impulse of Deity; by which a Christian would naturally understand the true God, while a heathen, like the orator Nazarius, in his eulogy on Constantine, might take it for the celestial guardian power of the _urbs aeterna_.