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.

Cardinals from across the globe will gather in the Sistine Chapel from May 7 to choose the next pope, with no contact with the outside world until a decision is made.

The papal conclave to replace Pope Francis will begin Wednesday, May 7, the Vatican said on Monday. Cardinals will convene at the Vatican to begin a process of choosing a new pope, who will become the Catholic Church's 267th leader.