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.

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.

As a missionary and bishop in Peru, the future Pope Leo came face-to-face with one of the most serious and far-reaching scandals in the church in Latin America.