The Rev. Paul Galetto once showed a young Robert Prevost around the city of Rome — decades later, Prevost held his first Mass in the Sistine Chapel as Pope Leo XIV, the first pope in the Catholic Church's history to be born in the United States.

Galetto, the pastor at St. Paul Church in South Philadelphia's Italian Market, once lived with Prevost. They both resided in Rome at the Collegio Internazionale di Santa Monica, a home for members of the Augustinian order to which they belong. "I first introduced him to the city of Rome, and now, he's the Bishop of Rome. Amazing," Galetto said.