ROME (AP) — Pope Leo XIV on Sunday told more than a million Catholic youths at a closing Mass for a weeklong encounter with the next generation of faithful that they are “the sign that a different world is possible” where conflicts can be resolved with dialogue, not weapons.

It all has the vibe of a World Youth Day, the Catholic Woodstock festival that St. John Paul II inaugurated and made famous in Rome in 2000 at the very same Tor Vergata field. Then, before an estimated 2 million people, John Paul told the young pilgrims they were the “sentinels of the morning” at the dawn of the third millennium.

Pope Leo celebrated the largest event yet of his nearly three-month tenure on Sunday, encouraging a crowd of more than a million Catholic young people gathered in a field on the outskirts of Rome to spread their faith.