A nun smiles as she holds a flag with the Vatican and the Turkish national flags as she waits to see Pope Francis visiting Haghia Sofia, the Byzantine church-turned-mosque that is now a museum, in Istanbul, Turkey, Saturday, Nov. 29, 2014. Pope Francis visits two of Turkey's most iconic sites and shifts gears toward more religious affairs as he arrives in Istanbul for the second leg of his three-day visit to the Muslim nation. (AP Photo/Markus Schreiber)