yes, he encouraged it upon the empire.
another answer
It has never been fully established whether he was a Christian. There are many reasons to suspect that it might have been more related to politics than genuine convictions regarding the Christain faith.
Constantine was the first Christian Emperor
He was the first prominently Christian emperor of Rome
The first Roman emperor named Constantine was Constantine I or the Great. He reigned a co-emperor from 306 to 324 and as the sole emperor from 324 to 337. He was the 57th Roman emperor.
Constantine was a great emperor, he stopped the persecution of Christians, and established tolerance to all religions in Rome.
He moved the capital of Rome to Byzantium, later known as Constantinople, and named the city New Rome. Constantine was also the first Christian Roman emperor.
It officially began at the Council of Nicaea in 325 AD by Emperor Constantine.
Emperor Constantine I made Christianity the main religion in Rome, ending all prosecution.
Constantine was the first christian emperor
Constantine was the first Christian emperor in 306AD and he made it the state religion.
He was the Roman Emperor who ended Christian persecution and declared Christianity the religion of Rome
Constantine I
Yes. Even in the time of the apostle Paul, we know there were Christians in Rome. By the second century, the Christian community in Rome was under the leadership of a bishop. By the time of Emperor Constantine, more than ten per cent of the population of Rome was Christian.