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Pope Francis waves to crowds as he arrives for his inaugural mass in Saint Peter's Square at the Vatican, March 19, 2013.

Pope Francis waves as he arrives in Saint Peter's Square for his inaugural mass at the Vatican, March 19, 2013.

Crowds fill Saint Peter's Square for the inaugural mass of Pope Francis at the Vatican, March 19, 2013.

Pope Francis reaches out for a child in Saint Peter's Square at the Vatican, March 19, 2013.

The Fisherman's Ring is placed on the finger of Pope Francis by Cardinal Angelo Sodano, Dean of the College of Cardinals, during his inaugural mass at the Vatican, March 19, 2013.

Pope Francis celebrates his inaugural mass in Saint Peter's Square at the Vatican, March 19, 2013.

Pope Francis receives the ring symbolizing the papacy and a wool stole symbolizing his role as shepherd of his 1.2-billion strong flock, March 19, 2013.

Pope Francis celebrates his inaugural mass in Saint Peter's Square at the Vatican, March 19, 2013.

Pope Francis walks past the alter in front of Saint Peter's Basilica following his inaugural mass at the Vatican, March 19, 2013.

Two nuns watch the crowd at Saint Peter's Square for Pope Francis' inaugural mass at the Vatican, March 19, 2013. (A. Pessin/VOA)

Faithful watch the inaugural mass of Pope Francis on a giant screen next to the Metropolitan Cathedral in Buenos Aires, Argentina, March 19, 2013.