Take a look back at the papacy of Pope Benedict XVI.
Newly elected Pope Benedict XVI (L) appears on the central balcony of St Peter's Basilica on April 19, 2005 in Vatican City.
Pope Benedict XVI prays in front of the tomb of the pope John Paul II in the crypt of St. Peter's Basilica during the All Souls Day November 2, 2005 in the Vatican City.
Pope Benedict XVI celebrates the holy mass on the Islinger Feld on September 12, 2006 in Regensburg, Germany.
Pope Benedict XVI attends the celebration of the Sacrament of Penance with the youth at the St. Peter's Basilica, March 29, 2007, in Vatican City.
Pope Benedict XVI is driven through Naples to attend the Inter Religious Conference on October 21, 2007 in Naples, Italy.
Pope Benedict XVI (L) and U.S. President George W. Bush pause for photographers while walking to the Oval Office along the Rose Garden colonnade at the White House April 16, 2008 in Washington, DC.
Pope Benedict XVI holds his Final Mass of World Youth Day at Randwick Racecourse on July 20, 2008 in Sydney, Australia.
Pope Benedict XVI waves beside 'The Staff of Moses' during his visit to Mountain Nebo on May 9, 2009, 40 kilometers southwest of Amman, Jordan.
Pope Benedict XVI waves as he arrives in St. Peter's Square after leading the Te Deum prayer on December 31, 2009 in Vatican City, Vatican.
Pope's personal secretary Georg Ganswein adjusts Pope Benedict XVII's 'Saturno' (pontiff's hut) as they arrive at St. Peter's square for the weekly audience on October 6, 2010 in Vatican City, Vatican
Pope Benedict XVI holds the homily during his visit to the Lutheran Church of Rome on March 14, 2010 in Vatican City, Vatican. Benedict spoke about the relationships between the different Christian churches.
Pope Benedict XVI takes a gondola ride from Saint Mark Square to Salute Church on May 8, 2011 in Venice, Italy. Pope Benedict XVI is visiting Venice, some 26 years after predecessor Pope John Paul II last visited city.
Pope Benedict XVI delivers his Christmas Day message 'urbi et orbi' blessing (to the city and to the world) from the central balcony of St Peter's Basilica on December 25, 2011 in Vatican City, Vatican.
Pope Benedict XVI attends the Vespers Prayer Service at the San Gregorio al Celio Basilica on March 10, 2012 in Rome, Italy.
Prince and Grand Master of the Order of Malta, Fra Matthew Festing stands near Pope Benedict XVI during a mass given to mark the 900th anniversary of the official recognition of the Order of Malta by Pope Pascal II on Feb 9, 2013 in Vatican City.
Pope Benedict XVI baptises a child in the Sistine Chapel on January 13, 2013 in Vatican City, Vatican.
Pope Benedict XVI is projected on a screen to the crowd as he delivers his Christmas Day message from the central balcony of St Peter's Basilica on December 25, 2012 in Vatican City, Vatican.