In this photo provided by the Vatican newspaper L'Osservatore Romano, Pope Benedict XVI reads a document in Latin where he announces his resignation, during a meeting of Vatican cardinals, at the Vatican, Monday, Feb. 11, 2013. Benedict XVI announced Monday that he would resign Feb. 28 - the first pontiff to do so in nearly 600 years. The decision sets the stage for a conclave to elect a new pope before the end of March. (AP Photo/L'Osservatore Romano, ho)
In this photo provided by the Vatican newspaper L'Osservatore Romano, Pope Benedict XVI, center, leaves after attending a meeting of Vatican cardinals where he read a document in Latin in which he announced his resignation, at the Vatican, Monday, Feb. 11, 2013. Benedict XVI announced Monday that he would resign Feb. 28 - the first pontiff to do so in nearly 600 years. The decision sets the stage for a conclave to elect a new pope before the end of March. (AP Photo/L'Osservatore Romano, ho)
Pope Benedict XVI greets the faithful from his studio's window overlooking St.Peter's square at the end of the Angelus noon prayer, at the Vatican, Sunday, Feb. 10, 2013. (AP Photo/Gregorio Borgia)
Pope Benedict XVI blesses the faithful from his studio's window overlooking St.Peter's square during the Angelus noon prayer, at the Vatican, Sunday, Feb. 10, 2013. (AP Photo/Gregorio Borgia)
The statues of St.PeteR, left, and Jesus, center, are pictured at the Vatican, Monday, Feb. 11, 2013. Pope Benedict XVI said Monday he lacks the strength to fulfill his duties and on Feb. 28 will become the first pontiff in 600 years to resign. The announcement sets the stage for a conclave in March to elect a new leader for world's 1 billion Catholics. (AP Photo/Gregorio Borgia)
FILE - In this April 9, 2009 file photo, Pope Benedict XVI offers a nun the Holy Communion, a Chrism Mass inside St. Peter's Basilica at the Vatican, as Benedict XVI celebrated a Holy Thursday Mass that included the traditional blessing of holy oils - some of which the church will send to an earthquake zone as a sign of closeness to the stricken population. Pope Benedict XVI announced Monday, Feb. 11, 2013, he would resign Feb. 28 because he is simply too old to carry on. (AP Photo/Andrew Medichini, File)
FILE - This Nov. 22, 2010 file photo shows Pope Benedict XVI leaving at the end of an audience with newly-appointed cardinals and their relatives, in Paul VI Hall, at the Vatican. On Monday, Feb. 11, 2013 the Vatican announced that Pope Benedict XVI will resign on Feb. 28, 2013. (AP Photo/Andrew Medichini)
In this photo provided by the Vatican newspaper L'Osservatore Romano, Pope Benedict XVI, third from left, delivers his message at the end of a meeting of Vatican cardinals, at the Vatican, Monday, Feb. 11, 2013. Benedict XVI announced Monday that he would resign Feb. 28 - the first pontiff to do so in nearly 600 years. The decision sets the stage for a conclave to elect a new pope before the end of March. From left are Archbishop Georg Gaenswein, Mons. Franco Camaldo, and Mons. Guido Marini, pope aides. (AP Photo/L'Osservatore Romano, ho)
FILE - In this Sunday, April 24, 2005 file photo, Archbishop Piero Marini drapes Pope Benedict XVI with the pallium during his installment Mass in St. Peter's Square at the Vatican. Pope Benedict XVI announced Monday, Feb. 11, 2013, he would resign Feb. 28 because he is simply too old to carry on. (AP Photo/Gregorio Borgia, File)
Vatican spokesman Father Federico Lombardi reads from Pope Benedfict XVI's book "Light of the World" as he meets journalists at the Vatican, Monday, Feb. 11, 2013. Pope Benedict XVI announced Monday that he would resign Feb. 28 � the first pontiff to do so in nearly 600 years. The decision sets the stage for a conclave to elect a new pope before the end of March. (AP Photo/Gregorio Borgia)
FILE - This April 24, 2005 file photo shows Pope Benedict XVI opening his arms as he celebrates his installment Mass in St. Peter's Square, at the Vatican. Pope Benedict XVI announced Monday, Feb. 11, 2013 that he would resign on Feb. 28 because he was simply too infirm to carry on - the first pontiff to do so in nearly 600 years. The decision sets the stage for a conclave to elect a new pope before the end of March. (AP Photo/Alessandra Tarantino, file)
In this photo provided by the Vatican newspaper L'Osservatore Romano, Pope Benedict XVI, sitting on the throne at center-right, attends a meeting of Vatican cardinals, at the Vatican, Monday, Feb. 11, 2013. Benedict XVI announced Monday that he would resign Feb. 28 - the first pontiff to do so in nearly 600 years. The decision sets the stage for a conclave to elect a new pope before the end of March. (AP Photo/L'Osservatore Romano, ho)
The Latin text which Pope Benedict XVI read during a meeting with Vatican cardinals where he announced his resignation is shown to journalists at the Vatican press hall during a press conference by Vatican spokesman Federico Lombardi, not pictured, at the Vatican, Monday, Feb. 11, 2013. Pope Benedict XVI announced Monday that he would resign Feb. 28 � the first pontiff to do so in nearly 600 years. The decision sets the stage for a conclave to elect a new pope before the end of March. (AP Photo/Gregorio Borgia)
In this photo provided by the Vatican newspaper L'Osservatore Romano, Pope Benedict XVI, sitting on the throne at left, attends a meeting of Vatican cardinals, at the Vatican, Monday, Feb. 11, 2013. Benedict XVI announced Monday that he would resign Feb. 28 - the first pontiff to do so in nearly 600 years. The decision sets the stage for a conclave to elect a new pope before the end of March. (AP Photo/L'Osservatore Romano, ho)
In this photo provided by the Vatican newspaper L'Osservatore Romano, Pope Benedict XVI delivers his message at the end of a meeting of Vatican cardinals, at the Vatican, Monday, Feb. 11, 2013. Benedict XVI announced Monday that he would resign Feb. 28 - the first pontiff to do so in nearly 600 years. The decision sets the stage for a conclave to elect a new pope before the end of March. (AP Photo/L'Osservatore Romano, ho)
In this photo provided by the Vatican newspaper L'Osservatore Romano, Pope Benedict XVI delivers his message at the end of a meeting of Vatican cardinals, at the Vatican, Monday, Feb. 11, 2013. Benedict XVI announced Monday that he would resign Feb. 28 - the first pontiff to do so in nearly 600 years. The decision sets the stage for a conclave to elect a new pope before the end of March. (AP Photo/L'Osservatore Romano, ho)
In this photo provided by the Vatican newspaper L'Osservatore Romano, Pope Benedict XVI delivers his blessing at the end of a meeting of Vatican cardinals, at the Vatican, Monday, Feb. 11, 2013. Benedict XVI announced Monday that he would resign Feb. 28 - the first pontiff to do so in nearly 600 years. The decision sets the stage for a conclave to elect a new pope before the end of March. (AP Photo/L'Osservatore Romano, ho)
Vatican spokesman Father Federico Lombardi meets the journalists at the Vatican, Monday, Feb. 11, 2013. Pope Benedict XVI announced Monday that he would resign Feb. 28 � the first pontiff to do so in nearly 600 years. The decision sets the stage for a conclave to elect a new pope before the end of March. (AP Photo/Gregorio Borgia)
In this photo provided by the Vatican newspaper L'Osservatore Romano, Pope Benedict XVI, center, reads a document in Latin where he announces his resignation, during a meeting of Vatican cardinals, at the Vatican, Monday, Feb. 11, 2013. Benedict XVI announced Monday that he would resign Feb. 28 - the first pontiff to do so in nearly 600 years. The decision sets the stage for a conclave to elect a new pope before the end of March. (AP Photo/L'Osservatore Romano, ho)
The Latin text which Pope Benedict XVI read during a meeting with Vatican cardinals where he announced his resignation, is seen in the background as a journalist types on a mobile device during a press conference held by Vatican spokesman Federico Lombardi, not pictured, at the Vatican, Monday, Feb. 11, 2013. Pope Benedict XVI announced Monday that he would resign Feb. 28 - the first pontiff to do so in nearly 600 years. The decision sets the stage for a conclave to elect a new pope before the end of March. (AP Photo/Gregorio Borgia)
RECROP OF VAT114 - In this photo provided by the Vatican newspaper L'Osservatore Romano, Mons. Franco Comaldo, a pope aide, left, looks at Pope Benedict XVI as he reads a document in Latin where he announces his resignation, during a meeting of Vatican cardinals, at the Vatican, Monday, Feb. 11, 2013. Benedict XVI announced Monday that he would resign Feb. 28 - the first pontiff to do so in nearly 600 years. The decision sets the stage for a conclave to elect a new pope before the end of March. (AP Photo/L'Osservatore Romano, ho)
FILE - In this April 28, 2009 file photo provided then by the Vatican newspaper L'Osservatore Romano, Pope Benedict XVI stands by the salvaged remains of Pope Celestine V, in the 13th-century Santa Maria di Collemaggio Basilica, the symbol of the city of L'Aquila, whose roof partially caved in during the quake. Benedict XVI announced Monday, Feb. 11, 2013 that he would resign on Feb. 28 because he was simply too infirm to carry on - the first pontiff to do so in nearly 600 years. The decision sets the stage for a conclave to elect a new pope before the end of March. Pope Celestine V, the 13th-century hermit and saint, was one of the earlier popes to resign. (AP Photo/L'Osservatore Romano, file)
In this photo provided by the Vatican newspaper L'Osservatore Romano, Mons. Franco Comaldo, left, a pope aide, looks at Pope Benedict XVI as he reads a document in Latin where he announces his resignation, during a meeting of Vatican cardinals, at the Vatican, Monday, Feb. 11, 2013. Benedict XVI announced Monday that he would resign Feb. 28 - the first pontiff to do so in nearly 600 years. The decision sets the stage for a conclave to elect a new pope before the end of March. (AP Photo/L'Osservatore Romano, ho)
In this photo provided by the Vatican newspaper L'Osservatore Romano, Cardinal Angelo Sodano, Dean of the College of Cardinals, center, talks to other cardinals after Pope Benedict XVI, not pictured, announced his resignation during a meeting with the cardinals, at the Vatican, Monday, Feb. 11, 2013. Benedict XVI announced Monday that he would resign Feb. 28 - the first pontiff to do so in nearly 600 years. The decision sets the stage for a conclave to elect a new pope before the end of March. (AP Photo/L'Osservatore Romano, ho)
In this photo provided by the Vatican newspaper L'Osservatore Romano, Cardinals talk amongst themselves after Pope Benedict XVI, not pictured, announced his resignation during a meeting with the cardinals, at the Vatican, Monday, Feb. 11, 2013. Benedict XVI announced Monday that he would resign Feb. 28 - the first pontiff to do so in nearly 600 years. The decision sets the stage for a conclave to elect a new pope before the end of March. (AP Photo/L'Osservatore Romano, ho)
FILE - In this Oct. 17, 2005 file photo Pope Benedict XVI wipes his face during a solemn adoration of the Eucharist in St. Peter's Basilica at the Vatican. On Monday, Feb. 11, 2013 Benedict XVI announced he would resign Feb. 28, the first pontiff to do so in nearly 600 years. The decision sets the stage for a conclave to elect a new pope before the end of March. (AP Photo/Domenico Stinellis, files)
Vatican spokesman Father Federico Lombardi reads from "Code of the Canon Law" as he meets journalists at the Vatican, Monday, Feb. 11, 2013. Pope Benedict XVI announced Monday that he would resign Feb. 28 � the first pontiff to do so in nearly 600 years. The decision sets the stage for a conclave to elect a new pope before the end of March. (AP Photo/Gregorio Borgia)
FILE - In this Friday, Sept. 12, 2008 file photo, Pope Benedict XVI waves to wellwishers as he leaves the Notre-Dame cathedral in Paris, following a vespers service. Pope Benedict XVI announced Monday, Feb. 11, 2013, he would resign Feb. 28 because he is simply too old to carry on. (AP Photo/Philippe Wojazer, Pool, File)
In this photo provided by the Vatican newspaper L'Osservatore Romano, Pope Benedict XVI delivers his message at the end of a meeting of Vatican cardinals, at the Vatican, Monday, Feb. 11, 2013. Benedict XVI announced Monday that he would resign Feb. 28 - the first pontiff to do so in nearly 600 years. The decision sets the stage for a conclave to elect a new pope before the end of March. (AP Photo/L'Osservatore Romano, ho)
FILE - This May 25, 2006 file photo shows Pope Benedict XVI lifting his scull cap during an ecumenical meeting at the Holy Trinity church in Warsaw, Poland. On Monday, Feb. 11, 2013 Benedict XVI announced he would resign Feb. 28, the first pontiff to do so in nearly 600 years. The decision sets the stage for a conclave to elect a new pope before the end of March. (AP Photo/Diether Endlicher, file)
FILE - In this April 28, 2009 file photo provided then by the Vatican newspaper L'Osservatore Romano, Pope Benedict XVI stands by the salvaged remains of Pope Celestine V, in the 13th-century Santa Maria di Collemaggio Basilica, the symbol of the city of L'Aquila, whose roof partially caved in during the quake. Benedict XVI announced Monday, Feb. 11, 2013 that he would resign on Feb. 28 because he was simply too infirm to carry on - the first pontiff to do so in nearly 600 years. The decision sets the stage for a conclave to elect a new pope before the end of March. Pope Celestine V, the 13th-century hermit and saint, was one of the earlier popes to resign. (AP Photo/L'Osservatore Romano, file)
FILE - This April 19, 2005 file photo shows Pope Benedict XVI greeting the crowd from the central balcony of St. Peter's Basilica moments after being elected, at the Vatican. On Monday, Feb. 11, 2013 Benedict XVI announced he would resign Feb. 28, the first pontiff to do so in nearly 600 years. The decision sets the stage for a conclave to elect a new pope before the end of March. (AP Photo/Domenico Stinellis/FILE)
FILE - In this April 28, 2009 file photo provided then by the Vatican newspaper L'Osservatore Romano, Pope Benedict XVI stands by the salvaged remains of Pope Celestine V, in the 13th-century Santa Maria di Collemaggio Basilica, the symbol of the city of L'Aquila, whose roof partially caved in during the quake. Benedict XVI announced Monday, Feb. 11, 2013 that he would resign on Feb. 28 because he was simply too infirm to carry on - the first pontiff to do so in nearly 600 years. The decision sets the stage for a conclave to elect a new pope before the end of March. Pope Celestine V, the 13th-century hermit and saint, was one of the earlier popes to resign. (AP Photo/L'Osservatore Romano, file)
FILE - This April 19, 2005 file photo shows Pope Benedict XVI greeting the crowd from the central balcony of St. Peter's Basilica moments after being elected, at the Vatican. On Monday, Feb. 11, 2013 Benedict XVI announced he would resign Feb. 28, the first pontiff to do so in nearly 600 years. The decision sets the stage for a conclave to elect a new pope before the end of March. (AP Photo/Domenico Stinellis/FILE)
FILE - In this Sunday, March 25, 2012 file photo, pilgrims cheer and sing as they wait at the site where Pope Benedict XVI will give a Mass in Bicentennial Park near Silao, Mexico. Pope Benedict XVI announced Monday, Feb. 11, 2013, he would resign Feb. 28 because he is simply too old to carry on. (AP Photo/Dario Lopez-Mills, File)
FILE - This April 19, 2005 file photo shows Pope Benedict XVI greeting the crowd from the central balcony of St. Peter's Basilica moments after being elected, at the Vatican. On Monday, Feb. 11, 2013 Benedict XVI announced he would resign Feb. 28, the first pontiff to do so in nearly 600 years. The decision sets the stage for a conclave to elect a new pope before the end of March. (AP Photo/Domenico Stinellis/FILE)
FILE - In this Sunday, March 25, 2012 file photo, Pope Benedict XVI waves from the popemobile wearing a Mexican sombrero as he arrives to give a Mass in Bicentennial Park near Silao, Mexico. Pope Benedict XVI announced Monday, Feb. 11, 2013, he would resign Feb. 28 because he is simply too old to carry on. (AP Photo/Eduardo Verdugo, File)
In this photo taken on June 30, 2007, a Vatican usher, foreground, closes a door as Pope Benedict XVI leaves after an audience in Pope Paul VI hall, at the Vatican. On Monday, Feb. 11, 2013 the Vatican announced that Pope Benedict XVI will resign on Feb. 28, 2013. (AP Photo/Andrew Medichini, files)
FILE - In this Friday, March 23, 2012 file photo, Mexico's President Felipe Calderon, left, looks on as Pope Benedict XVI is greeted by children at the airport in Silao, Mexico, his first to the country. Pope Benedict XVI announced Monday, Feb. 11, 2013, he would resign Feb. 28 because he is simply too old to carry on. (AP Photo/Gregorio Borgia, File)
Pope Benedict XVI walks away from his studio window overlooking St. Peter's Square after delivering his Angelus noon prayer, at the Vatican, in this Sunday, Feb. 10, 2013 photo made available Monday, Feb. 11, 2013. On Monday, the Vatican announced that Pope Benedict XVI will resign on Feb. 28, 2013. (AP Photo/Gregorio Borgia)
FILE - In this Sunday, March 22, 2009 file photo, Pope Benedict XVI arrives in the popemobile to celebrate a Mass on the outskirts of Angola's seaside capital, Luanda, the last major event before the end of the visit on the following day. Pope Benedict XVI announced Monday, Feb. 11, 2013, he would resign Feb. 28 because he is simply too old to carry on. (AP Photo/Andrew Medichini, File)
FILE - This Nov. 26, 2011 file photo shows Pope Benedict XVI waving as he leaves Paul VI hall after attending a concert of the Asturias Principality Symphony Orchestra directed by Chilean conductor Maximiano Valdes, at the Vatican. On Monday, Feb. 11, 2013 the Vatican announced that Pope Benedict XVI will resign on Feb. 28, 2013. (AP Photo/ Isabella Bonotto, file)
FILE - This Nov. 28, 2011 file photo shows Pope Benedict XVI leaving after a special audience he granted to members of the "Sister Nature" foundation, in the Pope Paul VI hall, at the Vatican, Monday, Nov. 28, 2011. On Monday, Feb. 11, 2013 the Vatican announced that Pope Benedict XVI will resign on Feb. 28, 2013. (AP Photo/Andrew Medichini, files)
FILE - This June 16, 2010 file photo shows Pope Benedict XVI leaving at the end of his weekly general audience in St. Peter's Square, at the Vatican. On Monday, Feb. 11, 2013 the Vatican announced that Pope Benedict XVI will resign on Feb. 28, 2013. (AP Photo/Gregorio Borgia, file)
FILE - This Nov. 26, 2011 file photo shows Pope Benedict XVI waving as he leaves Paul VI hall after attending a concert of the Asturias Principality Symphony Orchestra directed by Chilean conductor Maximiano Valdes, at the Vatican. On Monday, Feb. 11, 2013 the Vatican announced that Pope Benedict XVI will resign on Feb. 28, 2013. (AP Photo/ Isabella Bonotto, file)
St. Peter's Dome is pictured at the Vatican, Monday, Feb. 11, 2013. Pope Benedict XVI said Monday he lacks the strength to fulfill his duties and on Feb. 28 will become the first pontiff in 600 years to resign. The announcement sets the stage for a conclave in March to elect a new leader for world's 1 billion Catholics. (AP Photo/Gregorio Borgia)
FILE - This April 24, 2005 file photo shows Vatican master of Ceremonies Archbishop Piero Marini, not pictured, adjusting the skullcap of Pope Benedict XVI during his installment Mass in St. Peter's Square at the Vatican. Pope Benedict XVI said Monday, Feb. 11, 2013 he lacks the strength to fulfill his duties and on Feb. 28 will become the first pontiff in 600 years to resign. The announcement sets the stage for a conclave in March to elect a new leader for world's 1 billion Catholics. (AP Photo/Pier Paolo Cito, files)
FILE - This April 24, 2005 file photo shows thousands of people attending the installment Mass of Pope Benedict XVI in St. Peter's Square, at the Vatican. Pope Benedict XVI announced Monday, Feb. 11, 2013 that he would resign on Feb. 28 because he was simply too infirm to carry on � the first pontiff to do so in nearly 600 years. The decision sets the stage for a conclave to elect a new pope before the end of March. (AP Photo/Gregorio Borgia, files)
FILE - This July 10, 2009 file photo shows President Barack Obama and first lady Michelle Obama meeting with Pope Benedict XVI, at the Vatican. Pope Benedict XVI said Monday, Feb. 11, 2013 he lacks the strength to fulfill his duties and on Feb. 28 will become the first pontiff in 600 years to resign. The announcement sets the stage for a conclave in March to elect a new leader for world's 1 billion Catholics. (AP Photo/Haraz N. Ghanbari, file)
FILE - This April 24, 2005 file photo shows Pope Benedict XVI,center, holding a cross as he celebrates his installment Mass in St. Peter's Square, at the Vatican, Sunday, April 24, 2005. Benedict XVI announced Monday, Feb. 11, 2013, that he would resign on Feb. 28 because he was simply too infirm to carry on - the first pontiff to do so in nearly 600 years. The decision sets the stage for a conclave to elect a new pope before the end of March. (AP Photo/Andrew Medichini, files)
Nuns gather in St.Peter's Square at the Vatican, Monday, Feb. 11, 2013. Pope Benedict XVI said Monday he lacks the strength to fulfill his duties and on Feb. 28 will become the first pontiff in 600 years to resign. The announcement sets the stage for a conclave in March to elect a new leader for world's 1 billion Catholics. (AP Photo/Gregorio Borgia)
In this photo provided by the Vatican newspaper L'Osservatore Romano, Pope Benedict XVI, center, leaves after attending a meeting of Vatican cardinals where he read a document in Latin in which he announced his resignation, at the Vatican, Monday, Feb. 11, 2013. Benedict XVI announced Monday that he would resign Feb. 28 - the first pontiff to do so in nearly 600 years. The decision sets the stage for a conclave to elect a new pope before the end of March. (AP Photo/L'Osservatore Romano, ho)
Journalists gather outside the Vatican press hall in St. Peter's Square, with St.Peter's Basilica in the background, at the Vatican, Monday, Feb. 11, 2013. Pope Benedict XVI said Monday he lacks the strength to fulfill his duties and on Feb. 28 will become the first pontiff in 600 years to resign. The announcement sets the stage for a conclave in March to elect a new leader for world's 1 billion Catholics. (AP Photo/Gregorio Borgia)
FILE - In this Sunday, April 24, 2005 file photo, Pope Benedict XVI greets the crowd after celebrating his installation Mass in St. Peter's Square at the Vatican. Pope Benedict XVI announced Monday, Feb. 11, 2013, he would resign Feb. 28 because he is simply too old to carry on. (AP Photo/Gregorio Borgia, File)
Vatican spokesman Father Federico Lombardi reads from "Code of the Canon Law" as he meets journalists at the Vatican, Monday, Feb. 11, 2013. Pope Benedict XVI announced Monday that he would resign Feb. 28 � the first pontiff to do so in nearly 600 years. The decision sets the stage for a conclave to elect a new pope before the end of March. (AP Photo/Gregorio Borgia)
Postcards of Pope Benedict XVI, bottom, and late Pope John Paul II, are displayed outside a kiosk with St. Peter's Basilica in the background, at the Vatican, Monday, Feb. 11, 2013. Pope Benedict XVI announced Monday that he would resign Feb. 28 � the first pontiff to do so in nearly 600 years. The decision sets the stage for a conclave to elect a new pope before the end of March. (AP Photo/Gregorio Borgia)
In this photo provided by the Vatican newspaper L'Osservatore Romano, Pope Benedict XVI, right, and Cardinal Angelo Sodano, Dean of the College of Cardinals, hug each other after the pontiff announced during the meeting of Vatican cardinals that he would resign on Feb. 28, at the Vatican, Monday, Feb. 11, 2013. Benedict XVI announced Monday that he would resign Feb. 28 - the first pontiff to do so in nearly 600 years. The decision sets the stage for a conclave to elect a new pope before the end of March. (AP Photo/L'Osservatore Romano, ho)
Pope Benedict XVI's studio window is seen framed by a statue, at the Vatican, Monday, Feb. 11, 2013. Pope Benedict XVI announced Monday that he would resign Feb. 28 - the first pontiff to do so in nearly 600 years. The decision sets the stage for a conclave to elect a new pope before the end of March. (AP Photo/Gregorio Borgia)