Young people from 146 countries celebrated with Pope Leo XIV at the concluding Mass of the World Youth Jubilee at Rome's University of Tor Vergata on Sunday. The Vatican put the number of youths attending the event at more than a million,

The pontiff was greeted Aug. 2 by joyous crowds on the 237-acre grounds of the University of Rome Tor Vergata, 10 miles east of Rome.

"There is a burning question in our hearts, a need for truth that we cannot ignore, which leads us to ask ourselves: what is true happiness?"