Pope Leo XIV presided over a final mass in Rome for over one million young people Sunday, the culmination of a youth pilgrimage that has drawn Catholics from across the world. The week-long event ending Sunday,

The week-long event ending Sunday, a highlight of the Jubilee holy year, was an enormous undertaking for the Vatican, with a half a million young pilgrims in Rome for most of the week.

Pope Leo XIV addressed a massive crowd of about one million people at a Catholic youth vigil on Saturday, the Vatican said. It’s the pontiff’s biggest event since his election in May. NBC News’ Claudio Lavanga reports from Rome.