Pope Francis attends a holy liturgy celebrated by Ecumenical Patriarch Bartholomew I, at the Patriarchal Church of St. George in Istanbul, Sunday, Nov. 30, 2014. Pope Francis wrapped up his three-day visit to Turkey on Sunday with a liturgy alongside the spiritual leader of the world's Orthodox Christians and a meeting with young refugees who have fled Syria, Iraq and other conflict zones. (AP Photo/Gregorio Borgia)