Up to a million young Catholic believers are expected Saturday for a night-time vigil led by Pope Leo XIV, the culmination of a week-long pilgrimage, a key event in the Jubilee holy year.- Night vigil - The Vatican has praised Catholic youths who travelled to Rome from war-scarred countries like Ukraine or Syria,

Pope Leo XIV on Tuesday received a rock star's welcome at the Vatican's festival of Catholic influencers — priests, nuns and ordinary faithful who use their social media presence to preach and teach the faith — as he urged them to ensure that human relations don’t suffer with the spread of digital ecosystems and artificial intelligence.