Pope Francis (back C) leads the canonisation mass of Popes John XXIII (pictured on tapestry top R) and John Paul II (pictured on tapestry top L) on St Peter's at the Vatican on April 27, 2014. Catholics from around the world gathered in Rome on Sunday for a mass presided by Pope Francis to confer sainthood on John Paul II and John XXIII -- two influential popes who helped shape 20th century history. AFP PHOTO / ALBERTO PIZZOLI