Nuns wave Indian, left, and Argentine flags in St. Peter's Square at the Vatican, Feb. 27, 2013.Michael Sohn/The Associated Press
A general view of a packed Saint Peter's Square at the Vatican where Pope Benedict XVI holds his last general audience, Feb. 27, 2013.STEFANO RELLANDINI/Reuters
Cardinals arrive in St. Peter's Square at the Vatican, Feb. 27, 2013.Luca Bruno/The Associated Press
A Vatican Swiss Guard stands in front of St. Peter's Basilica at the Vatican, Feb. 27, 2013.Michael Sohn/The Associated Press
Two nuns peer out from a window in St. Peter's Square at the Vatican, Feb. 27, 2013.Luca Bruno/The Associated Press
Cardinal Reinhard Marx greets faithful in St. Peter's Square at the Vatican, Feb. 27, 2013.Michael Sohn/The Associated Press
Cardinal Roger Mahoney stands next to a row of chairs in St. Peter's Square at the Vatican, Feb. 27, 2013.Gregorio Borgia/The Associated Press
Faithful gather to attend Pope Benedict XVI's last general audience in St. Peter's Square, at the Vatican, Feb. 27, 2013.Dmitry Lovetsky/The Associated Press
Priests hold a banner reading in Spanish "The greatness of a man in the humility of a pope" in St. Peter's Square at the Vatican, Feb. 27, 2013.Gregorio Borgia/The Associated Press
A Bavarian band performs in St. Peter's Square at the Vatican, Feb. 27, 2013.Gregorio Borgia/The Associated Press
Nuns gather in St. Peter's Square at the Vatican, Feb. 27, 2013.Gregorio Borgia/The Associated Press
Faithful wave French and Vatican flags in St. Peter's Square at the Vatican, Feb. 27, 2013.Gregorio Borgia/The Associated Press
Pope Benedict XVI rides around St Peter's Square to hold his last general audience at the Vatican, Feb. 27, 2013.MAX ROSSI/Reuters
Pope Benedict XVI waves from his Popemobile as he rides through a packed Saint Peter's Square at the Vatican during his last general audience, Feb. 27, 2013.STEFANO RELLANDINI/Reuters
Pope Benedict XVI waves as he arrives for his last general audience in St. Peter's Square at the Vatican, Feb. 27, 2013.Gregorio Borgia/The Associated Press
Pope Benedict XVI greets pilgrims in St. Peter's Square at the Vatican for the final time before retiring, Feb. 27, 2013.Luca Bruno/The Associated Press
A nun holds sign in Saint Peter's Square where Pope Benedict XVI holds his last general audience, at the Vatican Feb. 27, 2013.MAX ROSSI/Reuters
Pope Benedict XVI waves as he arrives in St. Peter's Square at the Vatican, Feb. 27, 2013.Michael Sohn/The Associated Press
Pope Benedict XVI rides around St Peter's Square to hold his last general audience at the Vatican Feb. 27, 2013.MAX ROSSI/Reuters
Pope Benedict XVI blesses a baby as he rides around St Peter's Square to hold his last general audience at the Vatican Feb. 27, 2013.MAX ROSSI/Reuters
A general view of a packed Saint Peter's Square where Pope Benedict XVI holds his last general audience, at the Vatican Feb. 27, 2013.MAX ROSSI/Reuters
Pope Benedict XVI waves from his Popemobile as he rides through a packed Saint Peter's Square at the Vatican during his last general audience, Feb. 27, 2013.TONY GENTILE/Reuters
Pope Benedict XVI waves to pilgrims in St. Peter's Square at the Vatican, Feb. 27, 2013.Luca Bruno/The Associated Press
Pope Benedict XVI kisses a baby as he rides around St Peter's Square to hold his last general audience at the Vatican Feb. 27, 2013.MAX ROSSI/Reuters
Pope Benedict XVI arrives to take his seat in St Peter's Square to hold his last general audience at the Vatican Feb. 27, 2013.MAX ROSSI/Reuters
Pope Benedict XVI waves to the faithful after arriving in St Peter's Square to hold his last general audience at the Vatican Feb. 27, 2013.MAX ROSSI/Reuters
A nun waits in a packed Saint Peter's Square where Pope Benedict XVI holds his last general audience, at the Vatican Feb. 27, 2013.ALESSANDRO BIANCHI/Reuters
Pope Benedict XVI holds his last general audience in St Peter's Square at the Vatican Feb. 27, 2013.ALESSANDRO BIANCHI/Reuters