Pope Leo XIV's first full day as pontiff: Live updates from first Mass and more

A formal Mass to mark the inauguration of Pope Leo XIV will take place on May 18 in St. Peter's Square, the Vatican announced the day after stunning the world with the election of the first pope from the United States in the Church's history. Leo, formerly Cardinal Robert Francis Prevost, was born in Chicago and has dual Peruvian-American nationality after spending much of his career working there. He attended Villanova University, Catholic Theological Union in Chicago and the Pontifical College