(FILES) This file photo taken on May 13, 2010 shows the crowd attending a mass celebrated by Pope Benedict XVI at the Fatima's Sanctuary in Fatima on May 13, 2010. Pope Francis is heading to Fatima on May 12, 2017 on a pilgrimage that will attract up to a million faithful and see the pontiff canonise two child shepherds who reported apparitions of the Virgin Mary 100 years ago. / AFP PHOTO / JAVIER SORIANO