The closing ceremony of the Second Vatican Council in St. Peter Square on Dec. 9, 1965. Forty bishops pledged to forsake worldly goods, but the agreement was largely ignored. Pope Francis' emphasis on helping the poor has revived talk about the Pact of the Catacombs. Keystone-France/Gamma-Keystone via Getty Images hide caption

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Journalists Emiliano Fittipaldi, left, and Gianluigi Nuzzi face criminal charges, along with three former Vatican officials. They're seen here at events publicizing their new books about financial dealings in the Catholic Church. AP hide caption

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The balconies of St. Peter's at the Vatican in Rome. The two people arrested Monday were members of a committee convened by Pope Francis in 2013 to keep him abreast of financial reforms in the Vatican government. Giuseppe Ciccia/Barcroft Media /Landov hide caption

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Vatican spokesman Rev. Federico Lombardi (right) is denying claims in Italian newspapers that Pope Francis has a benign brain tumor. The rumors are part of an attempt to undermine the pope, the Vatican says. Andrew Medichini/AP hide caption

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Pope Francis is greeted by President Obama after arriving outside Washington, D.C., on Tuesday. Chip Somodevilla/Getty Images hide caption

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Pope Francis' embracing of the digital world and social media has given new meaning to the word "followers" for the Catholic Church. Gabriel Bouys/AFP/Getty Images hide caption

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Nuns greet Pope Francis as he arrives to lead the weekly audience in Saint Peter's Square at the Vatican on Thursday. The pope, speaking at his weekly general audience, said sometimes separation is "morally necessary." Tony Gentile/Reuters/Landov hide caption

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Pope Francis prays during his general audience in Saint Peter's Square at the Vatican on June 3. The pope has made statements supporting the idea that climate change is man-made, and his upcoming encyclical on the environment and poverty is highly anticipated. Vincenzo Pinto/AFP/Getty Images hide caption

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Pope Francis approved a plan Wednesday to set up a tribunal to review charges of negligence against bishops who are accused of covering up cases of sexual abuse by priests. Filippo Monteforte/AFP/Getty Images hide caption

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Pope Francis meets with Palestinian Authority President Mahmoud Abbas in the West Bank city of Bethlehem on May 25, 2014. The Vatican officially recognized the state of Palestine in a new treaty finalized today. Andrew Medichini/AP hide caption

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