Saint Paul the Apostle, originally known as Saul of Tarsus, was a key figure in early Christianity. Born around AD 5, he initially persecuted Christians but experienced a dramatic conversion on the road to Damascus. Following this event, he became a devoted follower of Jesus Christ and dedicated his life to spreading the Christian faith. Paul is best known for his missionary journeys throughout the Roman Empire and for writing several letters, or epistles, that form a significant part of the New Testament. His teachings emphasized faith, grace, and the importance of community among believers, shaping the foundation of Christian theology.