Pope Francis, left, hugs Ecumenical Patriarch Bartholomew I, after a holy liturgy at the Patriarchal Church of St. George in Istanbul, Sunday, Nov. 30, 2014. Pope Francis appealed for unity between the Catholic and Orthodox churches on Sunday as he wrapped up his visit to Turkey with a liturgy alongside the spiritual leader of the world's Orthodox Christians and a meeting with young refugees from Syria and Iraq. (AP Photo/Gregorio Borgia)