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"Pope Benedict XVI on Monday made the shock announcement that he will resign on February 28, the first pontiff to step down in modern Catholic Church history. Here are some examples of previous popes who have given up the papacy. "^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.france24.com/en/20130211-history-papal-resignations-before-pope-benedict-xvi-catholic-church>