Pope Francis's death at the age of 88 means the Catholic Church must choose a new leader. Here's how cardinals elect the next pontiff at the conclave.

Cardinal Kevin Farrell confirmed Pope Francis' death at the age of 88 early in the morning in a statement from the Vatican. There will be a period of mourning before the selection process involving the governing body of the Vatican and the 135 cardinals eligible to participate in the conclave begins.