Despite some differences, President Obama and Pope Francis shared a laugh during their Thursday meeting at the Vatican. Obama called himself a "great admirer" of the pope. Gabriel Bouys/AFP/Getty Images hide caption

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Gabriel Bouys/AFP/Getty Images

President Obama and Michelle Obama meet Pope Benedict XVI at the Vatican in 2009. The president will meet Pope Francis at the Vatican on Thursday. Getty Images hide caption

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The Sometimes Tricky Relations Between Popes And Presidents

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Then-Bishop Franz-Peter Tebartz-van Elst last August. The Vatican has accepted his resignation. Tebartz-van Elst spent lavishly on renovations at his residence and allegedly made false statements about expensive travel costs. Fredrik Von Erichsen /DPA/Landov hide caption

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Fredrik Von Erichsen /DPA/Landov

Marie Collins, who was assaulted as a 13-year-old by a priest in her native Ireland, will be a member of a commission that advises the Roman Catholic Church about confronting and preventing such abuse. Andrew Medichini/AP hide caption

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Andrew Medichini/AP

Pope Francis greets the crowd as he arrives for his general audience in St. Peter's Square at the Vatican last month. Vincenzo Pinto/AFP/Getty Images hide caption

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Vincenzo Pinto/AFP/Getty Images

One Year Later, 'A Pope For All' Keeps Catholics Guessing

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Newly-elected Cardinal Leopoldo Jose Brenes Solorzano, Archbishop of Managua, right, is hugged by Pope Emeritus Benedict XVI during a consistory inside the St. Peter's Basilica at the Vatican, on Saturday. Alessandra Tarantino/AP hide caption

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Alessandra Tarantino/AP

Pope Francis at the Vatican on Friday. The pope created 19 new cardinals in a ceremony Saturday in St Peter's Basilica. Peter Macdiarmid/Getty Images hide caption

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Peter Macdiarmid/Getty Images

Pope Welcomes New Cardinals, Many From Developing World

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Graffiti artist Mauro Palotta says Pope Francis is the only world leader who stands on the side of the people. Sylvia Poggoli/NPR hide caption

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Sylvia Poggoli/NPR

On A Roman Street, Graffiti Celebrates 'SuperPope'

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Pope Francis waves to faithful during the Angelus prayer from his studio overlooking St. Peter's Square at the Vatican on Sunday. President Obama will meet with the pope for the first time in March. Alessandra Tarantino/AP hide caption

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Alessandra Tarantino/AP

Finding Common Interests, Obama And The Pope Set A Date

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