II.

Early Life

Constantine the Great was born Flavius Valerius Constantinus at Niš, in what is now Serbia and Montenegro, son of the commander Constantius Chlorus (later Constantius I) and Helena (later Saint Helena), a camp follower. Constantius became co-emperor in 305. Constantine, who had shown military talent in the East, joined his father in an invasion of the British Isles in 306. He was popular with the troops, who proclaimed him emperor when Constantius died later the same year. Over the next two decades, however, Constantine had to fight his rivals for the throne, and he did not finally establish himself as sole ruler until 324.

Following the example of his father and earlier 3rd-century emperors, Constantine in his early life was a solar henotheist, believing that the Roman sun god, Sol, was the visible manifestation of an invisible “Highest God” (summus deus), who was the principle behind the universe. This god was thought to be the companion of the Roman emperor. Constantine’s adherence to this faith is evident from his claim of having had a vision of the sun god in 310 while in a grove of Apollo in Gaul. In 312, on the eve of a battle against Maxentius, his rival in Italy, Constantine is reported to have dreamed that Christ appeared to him and told him to inscribe the holy sign ΧΡ, the first two letters of the Greek word ΧΡΙSΤΟS (Christos), on the shields of his troops. The next day he is said to have seen a cross superimposed on the sun and the words “in this sign you will be the victor” (usually given in Latin, in hoc signo vinces). Constantine then defeated Maxentius at the Battle of the Milvian Bridge, near Rome. The Senate hailed the victor as savior of the Roman people. Thus, Constantine, who had been a pagan solar worshiper, now looked upon the Christian deity as a bringer of victory. Persecution of the Christians was ended, and Constantine’s co-emperor, Licinius, joined him in issuing the Edict of Milan (313), which mandated toleration of Christians in the Roman Empire. As guardian of Constantine’s favored religion, the church was then given legal rights and large financial donations.