'I am Roman,' Pope Leo says, as he becomes the bishop of Rome

Pope Leo XIV presides over a Mass in the St. John Lateran Basilica, formalizing his role as bishop of Rome in Rome on Sunday.

The bishop of Rome is one of many titles held by the pope. Duties related to the title are usually delegated to an auxiliary or assistant bishop, known as a vicar.

(Image credit: Gregorio Borgia)