Cardinal Crescenzio Sepe (L), archbishop of Naples shows the ampulla containing the blood of San Gennaro (Saint Januarius, patron of Naples) during a pastoral visit of Pope Francis at the Duomo on March 21, 2015 in Naples. Hundreds of thousands of people waving Vatican flags greeted Pope Francis as he headed deep into mafia territory, visiting jailbirds and the poor in Naples amid heightened security. AFP PHOTO / ALBERTO PIZZOLI