Pope Francis waves as he leads his Sunday Angelus prayer in Saint Peter's square at the Vatican on Sunday. Francis reportedly told an Italian newspaper that statistically, about 2 percent of Roman Catholic priests are pedophiles. Tony Gentile/Reuters/Landov hide caption

itoggle caption Tony Gentile/Reuters/Landov

Pope Francis prays during a visit to the Western Wall, Judaism's holiest site, in Jerusalem's Old City, earlier this week. While in the Holy Land, the pontiff extended an invitation to the presidents of Israel and the Palestinian Authority to join a prayer meeting at the Vatican. Debbie Hill/UPI/Landov hide caption

itoggle caption Debbie Hill/UPI/Landov

Father Ibrahim Shomali, a Palestinian priest, holds prayer vigils every Friday in the Cremisan Valley near Bethlehem. Israel is planning to build a wall, citing security needs, on agricultural land here owned by a local monastery. Shomali has asked Pope Francis to intervene. Emily Harris/NPR hide caption

itoggle caption Emily Harris/NPR

Tourists walk past a poster of Pope Francis hanging on the Church of the Nativity in the West Bank town of Bethlehem on Monday. Pope Francis' trip to the Mideast later this week will commemorate the 50th anniversary of a historic rapprochement between Catholics and Orthodox, who split nearly 1,000 years ago. Mussa Qawasma/Reuters/Landov hide caption

itoggle caption Mussa Qawasma/Reuters/Landov

Tapestry portraits of Pope John Paul II (left) and Pope John XXIII hang from balconies on the facade of St. Peter's Basilica in Rome. On Sunday, the two pontiffs will officially be declared saints. Claudio Peri/EPA/Landov hide caption

itoggle caption Claudio Peri/EPA/Landov

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

itoggle caption 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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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

itoggle caption 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

itoggle caption Andrew Medichini/AP