Pope Francis, left, and Ecumenical Patriarch Bartholomew I hold their hands and wave to faithful 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/Markus Schreiber)