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 have no contact with the outside world after the master of liturgical ceremonies utters the words “Extra Omnes” the Latin phrase for “all out,” to ask all those present except the cardinal electors to leave the Sistine Chapel to begin the voting process.

The Vatican announced Monday that the conclave to elect Pope Francis’ successor will begin on May 7, as the Church enters the final preparatory phase for choosing its 267th pope.