After solidifying his position to gain complete control of the western portion of the empire in 312, the Emperor Constantine instituted the Edict of Milan, a "Magna Carta of religious liberty," which eventually changed the Empire’s religion and put Christianity on an equal footing with paganism. Almost overnight the position of the Christian Church was reversed from persecuted to legal and accepted. Constantine began to rely on the church for support, and it on him for protection. The Church and the Empire formed an alliance, which remains to this day. Very rapidly, the laws and policies of the Empire and the doctrine of the Church became one with Constantine as the interpreter of both law and policy. This was accomplished by eliminating hundreds of books thought to be against "Church" doctrine and watering down what remained by blending Christian beliefs and practice with long established Roman sanctioned pagan worship.
One of the reasons for confusion about his conversion is that back then they didn't count a conversion until baptism, and he was not baptised until he was on his deathbed....
The information presented by the subject line of the thread is a misnomer, and thereby disposed of adequately by subsequent posts, imo. (Meaning, we mostly all agree that He was a renown figure.)
Constantine believed that the Church and the State should be as close as possible. Constantine tolerated pagan practices, keeping pagan gods on coins and retaining his pagan high priest title "Pontifex Maximus" in order to maintain popularity with his former subjects. In 330 he began an assault on paganism but used a clever method of persuasion to force people to follow the laws by combining pagan worship with Christianity. He made December 25th, the birthday of the pagan Unconquered Sun god, the official holiday now celebrated as the birthday of Jesus. He also replaced the weekly day of worship by making rest on Saturday unlawful and forcing the new religion to honor the first, not the seventh day, as a day of rest. As a way of defining his concept of the new universal religion he simply classified everything "Jewish" to be an abomination. Considering almost every aspect of the Bible is "Jewish" by association, every doctrinal biblical principle was changed or eliminated. After 337 Constantine increased his purging of the more obvious aspects of paganism. [/font]