Constantine was a follower of the Roman pagan religion before he hopped on the Christian bandwagon. He dabbled in the traditional Roman gods like Jupiter, Mars, and Venus, but eventually decided to switch teams and embrace Christianity as his main squeeze. So, in short, he was a pagan before he saw the light and became a Christian.
Saul (aka Paul) was a devout Jew before his conversion.
Islam
offshoot of judaism
None!
Constantine, if he converted to Christianity at all, was a death bed convert. He never lived a Christian life and many scholars question the story of his becoming a Christian. The conversion of an emperor such as Constantine was a great propaganda tool for use by the early Christians. That much we know.
Judaism and Christianity.
the Romans religion was Christianity
Protestant Christianity
Greco-Roman Paganism/Polytheism.
Jesus was a practicing Jew.
Before Christianity, they were pagan.
he had to do two things that's all I know.