Multiple rounds of voting likely will be required before a candidate emerges with the two-thirds majority required to become the next pope.

VATICAN CITY (AP) — One hundred and thirty-three cardinals are sequestering themselves behind the Vatican’s medieval walls for the start of a conclave starting Wednesday to elect a successor to Pope Francis. Here are some things to know about the election of the 267th pontiff of the Catholic Church, which has 1.4 billion faithful across the world.