© Melvyn Longhurst/Corbis

PETER AND PAUL EMBRACE AS FRIENDS in a mosaic at the Palatine Chapel at the Royal Palace of Palermo in Sicily. The two were among the Jewish followers of Jesus, but as the early community grew to include gentiles, they diverged: Peter continued the Judeo-Christian movement with Roman centurion Cornelius while Paul abandoned obligatory Jewish customs and returned with Barnabas to the growing gentile Christian community in Antioch.