20 of 25: Postcards of Pope Benedict XVI, bottom, and late Pope John Paul II, are displayed outside a kiosk with St. Peter's Basilica in the background, at the Vatican, Monday, Feb. 11, 2013. Pope Benedict XVI announced Monday that he would resign Feb. 28 ? the first pontiff to do so in nearly 600 years. The decision sets the stage for a conclave to elect a new pope before the end of March. (AP Photo/Gregorio Borgia) (AP Photo/ Gregorio Borgia)

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