Eighteen days after Pope Francis last appeared on the balcony of St. Peter's Basilica, his successor -- the 267th pope -- emerged.

Pope Leo XIV (formerly Robert Francis Prevost) and other cardinals adhered to many restrictions while inside the conclave. Here's everything they were forbidden to use—or eat—during the papal vote.

A new pope will be selected when a candidate gets a two-thirds-plus-one majority vote by the cardinal electors. White smoke will be sent up the chimney of the Sistine Chapel when that happens, to indicate a new pope has been chosen.