Cardinals from around the world must gather for the conclave in which Francis’ successor is selected. It typically takes between two and three weeks for a pope to be chosen, though it can stretch slightly beyond that if cardinals struggle to agree on a candidate.

The voting process is kept secret but will take place with the eyes of the world on the Vatican and amid intense scrutiny of the Catholic Church an institution whose reputation has been stained by the scandal of child sex abuse within its ranks, overshadowing the legacies of successive popes. Cardinals must now decide exactly when the funeral can take place, and after that, when conclave can begin. But much of the timeline is predetermined; the pope’s death triggered the start of nine days of mourning known as the Novendiales, and the pope must be buried between the fourth and sixth day after death.

The body of the pope must also be displayed at St. Peter’s Basilica for mourning, and a mass will take place on each day. Mourners lined up for miles to see the body of Pope John Paul II, the last serving pontiff to die, in 2005.It is likely that unofficial events will take place in tandem in Buenos Aires, where Francis lived before becoming the Bishop of Rome. In Warsaw, more than 200,000 gathered at the site where John Paul II, then Karol Wojtyla, returned as the new pope in 1979.Then, at the end of the period of mourning, a large funeral Mass will take place at St. Peter’s. This is historically a huge event, with dignitaries expected from around the world. John Paul II’s funeral was attended by then-President George W. Bush and his two predecessors, Bill Clinton and George H.W. Bush.  (CNN)