Pope Francis leads a mass in St Peter's square for the canonization of four blessed nuns, whose two lived in Ottoman Palestine, on May 17, 2015 in Vatican. Pope Francis will declare four nuns as Saints today, two nuns from Palestine St Marie Alphonsine Ghattas from Jerusalem and St Mariam Bawardy from Ibilin village in the Galilee, both of whom lived in the 19th century, St Emilie de Villeneuve from France and St Maria Cristina of the Immaculate Conception from Italy. AFP PHOTO / ALBERTO PIZZOLI