Six are joining in their first papal conclave, and four others participated in the 2013 conclave that elected Pope Francis.

The United States is the home country of 10 of the 133 cardinals eligible to vote for the next pope of the Catholic Church. That's more than any nation except Italy, home to 17 of the electors who will gather at the Vatican's Sistine Chapel on Wednesday for the conclave that will choose a successor to Pope Francis.

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