He was made bishop by the Apostle Peter and sent to Gaul as a missionary. Some believe that he was Simon the Leper, whom the Lord healed, later named Julian in Baptism. In Gaul, despite great difficulty and privation, he converted many to faith in Christ and worked many miracles — healing the sick, driving out demons, and even raising the dead. In time the local prince, Defenson, was baptised along with many of his subjects. He reposed in peace.