Although Mark was not one of the original twelve, he was a disciple of Jesus. He joined Paul and Barnabas on their first missionary journey, but left early. So Paul refused to take him on his second journey. Instead, Mark went with Barnabas to Cyprus. He was later reconciled with Paul, and became a good friend of Peter. The church of Alexandria claimed Mark as its first bishop and most famous martyr. St. Mark’s Church in Venice commemorates Mark, and he is buried there beneath the altar.