Pope Benedict XVI, and the leader of the world's Orthodox Christians, Patriarch Bartholomew I, celebrate a ceremony in memory of St. Paul, at St. Paul's Basilica Outside the Walls, in Rome, June 28, 2008.
SYDNEY, AUSTRALIA - JULY 20: His Holiness Pope Benedict XVI delivers the Eucharistic Prayer during the Final Mass at Southern Cross Precinct during World Youth Day Sydney 2008 on July 20, 2008 in Sydney, Australia. Organised every two to three years by the Catholic Church, World Youth Day (WYD) is an invitation from the Pope to the youth of the world to celebrate their faith. The celebration, being held in Sydney from July 15, 2008 to July 20, 2008, will mark the first visit of His Holiness Pope Benedict XVI to Australia. (Photo by World Youth Day)
Pope Benedict XVI prays during a Mass in St. Peter's Basilica to mark Epiphany, Wednesday, Jan. 6, 2010. The Epiphany day, is a joyous day for Catholics in which they recall the journey of the Three Kings or Magi to pay homage to Baby Jesus. (AP Photo/Pier Paolo Cito)
Pope Benedict XVI waves after celebrating the First Vespers on the occasion of the first week of Advent in Saint Peter's Basilica at the Vatican November 28, 2009. REUTERS/Alessia Pierdomenico (VATICAN RELIGION)
Pope Benedict XVI leaves The Basilica of St. John Lateran, after celebrating the "Cena Domini" mass, which includes a feet-washing ceremony, in Rome, Thursday April 9, 2009. The feet-washing ceremony symbolizes humility and commemorates Jesus' last supper with his 12 apostles on the evening before his Good Friday crucifixion. (AP Photo/Andrew Medichini)
