Constantine the Great
Paul was born under the name Saul and was a great persecutor of Christians. Born and raised under the Jewish law, Saul hated Christians. Then on a journey, Saul became a Christian when Jesus came to him in a vision. After this revelation Saul changed his name to Paul and said that this vision meant the end of all religions to him. He was convinced that Christianity was God's call to the entire world. After taking this call from God, he built many churches. Paul was transformed from the greatest persecutor of Christians to the greatest missionary of Christianity. He is the author of 13 of the 27 books in the New Testament. His ministry ended when he was executed in Rome in the year 62 AD.