Electing a new pope: What happens next?

The process reflects centuries-old traditions.

The process by which a new pope is elected has undergone numerous changes in the nearly two millennia that the Catholic Church has existed, with the current procedure a combination of ancient traditions and modern updates as recent as 2013, reflecting changes instituted by Pope Benedict XVI. Even so, the essential ritual has remained largely unchanged for centuries.

Pope Francis' death sets into motion a series of formalized rites and observances that occur during what is called the interregnum, which begins upon the pontiff's passing and ends with the election of his successor. The period of time during which the papacy is vacant is known as the sede vacante, Latin for "vacant seat."

The pope's death is first ritually verified by the cardinal camerlengo, or chamberlain, who who runs the ordinary affairs of the Vatican city-state during the sede vacante. A traditional nine days of mourning then commences. This includes the pope's funeral, which per tradition is held within four to six days of his death, after his body lies in state for several days in St. Peter's Basilica. This also allows global dignitaries and heads of state to pay their respects and attend the funeral.

It's also during the interregnum that all cardinals under the age of 80 who are eligible to participate are summoned to Rome to prepare for the secret conclave inside the Sistine Chapel to choose the next pontiff, a gathering that typically commences between 15 to 20 days after the pope's death. The cardinals spend the interregnum housed in private rooms in the Domus Marthae Sanctae -- essentially a residence hotel in the Vatican with dining facilities that usually houses visiting clergy and laity. Per tradition, the cardinals are cut off from the outside world, including televisions, phones, computers and newspapers.

The College of Cardinals will cast as many as four ballots in a single day for the next pope, with a two-thirds majority required to elect a pontiff. After each vote, the ballots are burned and smoke is released from the Sistine Chapel's chimney as a signal to the throngs holding vigil in St. Peter's Square. Black smoke -- fumata nera in Italian -- indicates an inconclusive vote, while white smoke -- fumata bianca -- will signify that a new pope has been elected. If three days pass with no pope elected, voting can be suspended for a day to allow the cardinals time for reflection before the next round of ballots are cast.

Once the College of Cardinals elects a new pope, the candidate is formally asked in the Sistine Chapel if he accepts the election and, if so, to choose his papal name. While popes have the option of keeping their baptismal name, every pope for the last 470 years has chosen to change his name, usually to honor a predecessor and to signal their intention to emulate his example.

The interregnum ends when the newly elected pope makes his first public appearance in his new role, stepping onto the central balcony at St. Peter's Basilica, overlooking St. Peter's Square, to bless the gathered crowd there after being introduced by the senior cardinal deacon with the traditional declaration "Habemus papum" – Latin for "We have a pope."