Cardinal Robert Prevost of Chicago will succeed Pope Francis as the leader of the Catholic Church. Prevost, the first American pope in history, will go by Leo XIV. Here's a look at the scenes across Rome and nearby countries after white smoke poured from the chimney.

Pope Leo XIV will formally take up his role as leader of the global Catholic Church on Sunday, with a Mass in St. Peter's Square that will draw tens of thousands of well-wishers, including dozens of world leaders and European royalty.

Leo, the first American and second Latin American pope, is holding his inaugural mass at the Vatican after waving to the faithful on the popemobile.