Pope Francis waves to the faithful as he leaves following a visit to Piazza Armerina, central Sicily, on September 15, 2018. - Pope Francis pays a one-day pastoral visit on September 15 to the Dioceses of Piazza Armerina and Palermo in Sicily, on the occasion of the 25th anniversary of the killing by the mafia of Sicilian priest Pino Puglisi. (Photo by Tiziana FABI / AFP)