Constantine’s whole career testified to the zeal with which he had embraced Christianity. We have seen the enthusiasm with which he set to work to build churches throughout the Empire. In Rome there are ascribed to him the Church of Saint Agnes, the Church of St. John Lateran, and another which stood on part of the site of the present St. Peter’s. In Constantinople he built the Churches of the Apostles, St. Eirene, and St. Sophia. In Jerusalem he built the Church of the Anastasis as the crowning memorial of his thirty years of reign, and in Antioch, Nicomedia, and a score of other cities his purse was constantly at the service of the Faith. The building of churches was a passion with him, and he also took care that they were provided with the Scriptures. Eusebius[137] gives the text of a letter written to him by the Emperor ordering fifty copies of the Scriptures to be executed without delay. Constantine published an edict commanding that the Lord’s day should be scrupulously observed and honoured, and that every facility should be given to Christian soldiers to enable them to attend the services. Even his pagan soldiers were to keep that day holy by offering up a prayer to the “King of Heaven,” in which they addressed him as the “Giver of Victory, their Preserver, Guardian, and Helper.” “Thee alone we know to be God; Thee alone we recognise as King; Thee we invoke as Helper; from Thee we have gained our victories; through Thee we are superior to our enemies. To Thee we give thanks for the benefits we now enjoy; from Thee we look for our benefits to come. All of us are Thy suppliants: and we pray that Thou wilt guard our King Constantine and his pious sons long, long to reign over us in safety and victory.” ----- Footnote 137: _De Vita Const._, iv., 36. ----- No pagan soldier could be offended at being required to offer this prayer to the King of Heaven. If he were sincere in his faith he would hope that it might reach the throne of Jupiter; Constantine evidently expected that, as it was addressed to the King of Heaven, it would be intercepted in midcourse and wafted to the throne of God. He was at any rate determined that no soldier of his, whether pagan or Christian, should wear on his shield any other sign than that of the Cross—“the salutary trophy.”