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

Who are the U.S. candidates at the papal conclave in Rome? Here's a list of American cardinals who will elect or possibly become the next pope.

The conclave to select the next pope has begun after Catholic cardinals from across the world filed into the Sistine Chapel Wednesday before sealing themselves inside.