Pope Benedict XVI holds the ostensory as he presides a New Year's Eve vespers service in St. Peter's Basilica at the Vatican, Monday, Dec. 31, 2012. Pope Benedict XVI has marked the end of a difficult year by saying that despite all the death and injustice in the world, goodness prevails. (AP Photo/Andrew Medichini), APTOPIX

Pope Benedict XVI celebrates the Vespers and Te Deum prayers in Saint Peter's Basilica the mark the end of 2012 at the Vatican on December 31, 2012. AFP PHOTO / ANDREAS SOLARO

Pope Benedict XVI arrives to pray in front of the nativity crib in Saint Peter's Square after celebrating the Vespers and Te Deum prayers in Saint Peter's Basilica at the Vatican on December 31, 2012. AFP PHOTO / ANDREAS SOLARO

Pope Benedict XVI lights a candle at his studio window overlooking St. Peter's Square at the Vatican, after the unveiling of the Nativity scene, Monday, Dec. 24, 2012. Pope Benedict XVI has lit a Christmas peace candle set on the windowsill of his private studio overlooking square. Pilgrims, tourists and Romans gathered below in St. Peter's Square for the inauguration Monday evening of a Nativity scene and cheered when the flame was lit. Later, he will appear in St. Peter's Basilica to lead Christmas Eve Mass. (AP Photo/Gregorio Borgia)

Pope Benedict XVI celebrates mass on December 16, 2012 during a visit to the San Patrizio al Colle Prenestino parish on the outskirts of Rome. AFP PHOTO/ Filippo MONTEFORTE

Pope Benedict XVI holds the pastoral staff as he celebrates a mass on the occasion of his visit at the St. Patrick parish church in Rome Sunday, Dec. 16, 2012. (AP Photo/Gregorio Borgia)

Pope Benedict XVI celebrates mass on December 16, 2012 during a visit to the San Patrizio al Colle Prenestino parish on the outskirts of Rome. AFP PHOTO/ Filippo MONTEFORTE

Pope Benedict XVI pulls back his mantle blown by the wind as he reads his message during the weekly general audience in St. Peter's Square at the Vatican, Wednesday, Sept. 26, 2012. (AP Photo/Gregorio Borgia)

Pope Benedict XVI gestures to pilgrims gathered in the courtyard of his summer residence in Castelgandolfo, 40 kms south east of Rome, during his weekly general audience on September 2, 2012 . AFP PHOTO / ANDREAS SOLARO

Pope Benedict XVI leaves his weekly general audience in St. Peter square at the Vatican, Wednesday, June 6, 2012. (AP Photo/Alessandra Tarantino)

Pope Benedict XVI celebrates a Pentecost Mass inside St. Peter's Basilica, at the Vatican, Sunday, May 27, 2012. (AP Photo/Andrew Medichini)

Pope Benedict XVI waves during his weekly general audience on April 25, 2012 at St Peter's square at The Vatican. AFP PHOTO / ALBERTO PIZZOLI

TOPSHOTS Pope Benedict XVI delivers the "Urbi et Orbi" Message and blessing to faithful from the central loggia of St Peter's basilica after the Easter Holy Mass on April 8, 2012 at The Vatican. Pope Benedict XVI on Sunday called for peace and stability in Mali and condemned the "savage terrorist attacks" against Christian churches in Nigeria and for an end to bloodshed in Syria. AFP PHOTO / GABRIEL BOUYS

Pope Benedict XVI arrives for the Easter Vigil on Holy Saturday on April 7, 2012 at St Peter's basilica at The Vatican. AFP PHOTO / VINCENZO PINTO

Pope Benedict XVI holds a candle during the Easter Vigil on Holy Saturday on April 7, 2012 at St Peter's basilica at The Vatican. AFP PHOTO / VINCENZO PINTO

Pope Benedict XVI, holding a tall, lit, white candle, enters a hushed and darkened St. Peter's Basilica, at the Vatican Saturday, April 7, 2012, to begin the Vatican's Easter vigil service. Except for the twinkle of camera flashes, the basilica was almost pitch-black as the thousands of faithful in pews awaited Benedict's arrival through the rear entrance Saturday night. Christians on Easter joyously mark their belief that Christ rose from the dead after his crucifixion. Praying at the start of the service, Benedict said Easter brings hope to the faithful. On Sunday morning, he will lead Easter Mass in St. Peter's Square. (AP Photo/Pier Paolo Cito)

Pope Benedict XVI attends the Palm Sunday celebration at Saint Peter's square at the Vatican, on April 1, 2012. The Palm Sunday marks the holy week of Easter in celebration of the crucifixion and resurrection of Jesus Christ. AFP PHOTO/ GABRIEL BOUYS

Pope Benedict XVI leads the holy mass at Revolution Square in Havana, on March 28, 2012. Benedict XVI was to meet Fidel Castro as he wraps up a three-day visit in which he called for a more "open society" on the Communist-run island.AFP PHOTO / ALBERTO PIZZOLI

In this picture made available Tuesday, March 27, 2012, by the Vatican newspaper Osservatore Romano, Pope Benedict XVI celebrates a mass at Revolution Square in Santiago de Cuba, Cuba, Monday, March 26, 2012 (AP Photo/Osservatore Romano)

Pope Benedict XVI delivers the "Urbi et Orbi" blessing from the balcony of St. Peter's basilica at the Vatican on December 25, 2011. AFP PHOTO / TIZIANA FABI