The Vatican estimates that more than one million young people from 146 countries gathered for Pope Leo’s largest mass since he was elected in May. In his homily, the Pope gave an encouraging message of hope to young crowd.

In his closing blessing for the Jubilee of Youth, Leo remembered the young people of Gaza and Ukraine and other countries "bloodied by war" who could not join their celebration.

The Chicago-born pope said that a gathering of young faithfuls in Rome was a "sign that a different world is possible."