His conversion is probably a fabrication convenient for Christians. He harnessed the Christian bishops as a second arm to his control of the Empire. He is alleged to have converted on his deathbed, so if it was real, his conversion was an insurance policy in case his Mithraic religion membership might fail him. In fact, he merged his imperial cult of Sol Invictus (Invincible Sun) with Christianity - look at all the Christian notables for hundreds of years afterwards and you will see the sun's image behind their heads. This was later converted to a skinny halo to avoid the embarrassment of an ever-present sun-cult in Christian depictions.
Emperor Constantine was instrumental in the conversion of Rome to Christianity in the 4th century. He issued the Edict of Milan in 313 AD, which legalized Christianity and eventually led to its establishment as the state religion.
A vision of a Christian symbol promised him victory during a crucial battle.
We don't know that Constantine ever converted to Christianity. There are many objections to the story of his "death bed conversion" and scholars and historians are at odds with the church people over this. What is certain, though, is that Constantine never lived the life of a Christian.
He converted to Christianity in 312.
Emperor Constantine
Constantine
Constantine's conversion to Christianity is often attributed to his vision before the Battle of Milvian Bridge in 312 AD. He reportedly saw a cross of light in the sky along with the words "In this sign, you will conquer." Believing this divine message, he adopted the Christian faith and ordered his soldiers to display the Christian symbol on their shields. His victory in the battle solidified his belief and led to the eventual promotion of Christianity within the Roman Empire.
Edward Gibbon suggested that Constantine's conversion to Christianity was one of the principal causes of the fall of the western Roman Empire, which ceased to exist 139 years after his death. At first glance this may seem so far removed from the time of Constantine as to preclude a direct relationship, but Constantine put in place a process that was irreversible. Another impact of Constantine's conversion to Christianity was the eventual conversion of the Roman Empire to Christianity, although once again this did not really occur until long after his death.
Maybe someone else can better on this answer. With Constantine's conversion to Christianity, a lot of power went to the Christians. Constantine donated land to build Churches, put christians in positions of authority, and led to Christian dominance in the Roman Empire. The Roman Empire Changed from this time. Also Constantine made Sunday the official Church day for Christians and he also influenced the date for Christmas. Constantine gave Christianity a big boost !
AnswerHistorians and scholars continue to debate how genuine Constantine's conversion to Christianity really was, with some saying that he merely saw Christianity as a useful tool for unifying and governing the empire. Whatever reasons Constantine had, his conversion to Christianity was one of the key events in world history. He gave state patronage to what had until then been very much a minority religion, began the persecution of the pagan temples, as well as persecution of the Jews, and ultimately ensured that Christianity dominated the empire and eventually spread throughout much of the world. Some may argue that the resultant spread of Christianity led to the rise of Islam in its present form.His close involvement in Church affairs ensured relative unity of Christianity for the short-term and helped change some of the doctrine and practices of the Church. Not only did Constantine begin to change the empire from pagan to Christian, he changed Christianity as well.
Constantine helped spread Christianity throughout the Roman Empire. He issued the Edict of Milan in 313, which granted religious tolerance to Christians and allowed them to practice their faith openly. Constantine's conversion to Christianity and support of the religion played a significant role in its growth and development.
AnswerWithout the conversion of Constantine, Christianity may have remained a minor sect within the Roman Empire. Certainly, it would never have achieved the ability to totally suppress other religions without imperial backing. The fact that Europe is seen today in terms of being Christian, is a legacy of Constantine and of his conversion to Christianity.