A view of the Sistine Chapel at the Vatican, Saturday, March 9, 2013.
When the Roman Catholic Church elects a new pope, it follows a practice that has remained virtually unchanged for centuries. The only difference this time is that the previous pope, Benedict XVI, is still alive.
The voting process of the conclave, as it is called, is shrouded in secrecy. The world will learn the outcome, but only insiders will know what happened.
The time, 115 members of the Church's College of Cardinals will gather in the Sistine Chapel in Vatican City, and do not emerge from their seclusion until they have chosen a new pope. On the first afternoon, one vote is taken. After that, they take four votes each day - two in the morning and two in the afternoon. A successful candidate needs two-thirds of the votes cast.
It took just four ballots to elect Benedict pope in 2005 to replace Pope John Paul II. But more often than not, the balloting takes several days.
No one campaigns openly to become pope. Instead, cardinals gather in small groups to talk to each other and discuss issues of concern to them in their regions of the world.
There is no time limit on a conclave. However long it takes the cardinals to decide, they are locked inside the Vatican, with no newspapers, no television or radio, and no Internet. They all take a vow of secrecy, and their aides also are prohibited from disclosing what takes place. After the morning and afternoon sessions, the ballots are treated with special chemicals and burned in a stove to produce either black or white smoke. Black smoke signifies the vote was not conclusive. White smoke means a new pope has been elected.
When that happens, it normally brings cheers from the thousands of people gathered outside to await the announcement. A senior cardinal then will step onto the balcony of St. Peter's Basilica and declare with great joy that the Church has a new pope.
The newly elected pope remains head of the Church for life, or until he retires, as Benedict did. The pope's reign is referred to as a pontificate.
There were nine different popes in the 20th century. The new pope will be the third in this 21st century.
New Pope Selected at the Vatican
1/13Newly elected Pope Francis, Cardinal Jorge Mario Bergoglio of Argentina, appears on the balcony of St. Peter's Basilica at the Vatican, March 13, 2013.
Pope Francis was selected on March 13, 2012, after 115 voting cardinals of the Roman Catholic Church reached a conclusion.
2/13April 4, 2005: Jorge Mario Bergoglio conducts a mass in honor of Pope John Paul II at the Buenos Aires cathedral. Bergoglio of Argentina was elected pope on March 13, 2013 to lead the Roman Catholic Church.
Pope Francis was selected on March 13, 2012, after 115 voting cardinals of the Roman Catholic Church reached a conclusion.
3/13Crowds cheer as white smoke rises from the chimney above the Sistine Chapel in the Vatican, March 13, 2013.
Pope Francis was selected on March 13, 2012, after 115 voting cardinals of the Roman Catholic Church reached a conclusion.
4/13White smoke rising from the chimney on the Sistine Chapel, indicating that a new pope has been elected.
Pope Francis was selected on March 13, 2012, after 115 voting cardinals of the Roman Catholic Church reached a conclusion.
5/13Crowds cheer as white smoke rises from the chimney above the Sistine Chapel, March 13, 2013.
Pope Francis was selected on March 13, 2012, after 115 voting cardinals of the Roman Catholic Church reached a conclusion.
6/13Nuns smile in Saint Peter's Square at the Vatican, March 13, 2013.
Pope Francis was selected on March 13, 2012, after 115 voting cardinals of the Roman Catholic Church reached a conclusion.
7/13People crowd Saint Peter's Square to await the sight of smoke from the chimney above the Sistine Chapel.
Pope Francis was selected on March 13, 2012, after 115 voting cardinals of the Roman Catholic Church reached a conclusion.
8/13Visitors wait in Saint Peter's Square during the second day of voting, March 13, 2013.
Pope Francis was selected on March 13, 2012, after 115 voting cardinals of the Roman Catholic Church reached a conclusion.
9/13Black smoke rises from the chimney on the roof of the Sistine Chapel in the Vatican City indicating that no decision has been made after the first day of voting for the election of a new pope, March 12, 2013.
Pope Francis was selected on March 13, 2012, after 115 voting cardinals of the Roman Catholic Church reached a conclusion.
10/13The crowd waits during the conclave in Saint Peter's Square at the Vatican, March 12, 2013.
Pope Francis was selected on March 13, 2012, after 115 voting cardinals of the Roman Catholic Church reached a conclusion.
11/13A view of the balcony on the facade of Saint Peter's Basilica where the newly elected pope will make his first appearance to salute the cheering crowd, at the Vatican, March 11, 2013.
Pope Francis was selected on March 13, 2012, after 115 voting cardinals of the Roman Catholic Church reached a conclusion.
12/13Saint Peter's Basilica at the Vatican is silhouetted during sunset in Rome, March 11, 2013.
Pope Francis was selected on March 13, 2012, after 115 voting cardinals of the Roman Catholic Church reached a conclusion.
13/13Saint Peter's Square, seen from the dome of Saint Peter's Basilica at the Vatican.
Pope Francis was selected on March 13, 2012, after 115 voting cardinals of the Roman Catholic Church reached a conclusion.
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