A nun is reflected in a shop window with portraits of Pope Benedict XVI, in Rome, Monday, Feb. 25, 2013. Pope Benedict XVI has changed the rules of the conclave that will elect his successor, allowing cardinals to move up the start date if all of them arrive in Rome before the usual 15-day transition between pontificates. Benedict signed a legal document, issued Monday, with some line-by-line changes to the 1996 Vatican law governing the election of a new pope. It is one of his last acts as pope before resigning Thursday. (AP Photo/Oded Balilty)
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