This year there were 193 nations represented. The countries with the most particpants were Italy, Spain, and France.
Church organizers say the event cost around 50 million euros, close to 72 million dollars. This came from the registration fee paid by the participants as well as donations from corporate sponsors.
To help with crowd control, over 18,000 police and civil servants were present. As well as 30,000 volunteers, placed throughout the city, who were handing out bottles of water.
Also 14,000 priests and 800 bishops concelebrated the closing Mass with Benedict XVI in the Cuatro Vientos Aerodrome. This was the size of 48 soccer fields.
The event also accredited more than 5,000 journalists from around the world to cover the twenty-sixth World Youth Day, the third such event presided over by Benedict XVI.