Hagia Sophia
Once one of the primary churches in Christendom, then a mosque, now a museum. Turkish conspiracy theorists say the Pope is going to sneakily re-consecrate it as a Church.
The Blue Mosque
This stop was squeezed into the papal schedule right before he left. Some Turks see his visit as a sign of respect for Islam; some think he's going to do something sneaky.
Jim Geraghty reports on what's gone right so far, recommends this piece, and warns:
Today is the big day, as he arrives in Istanbul and visits the Aya Sofia/Hagia Sofia and the Blue Mosque. If you pray about this sort of thing, it might be a good time to do that.
