Vatican, Papal Mass with Pope Francis, celebrated in front of St. Peter's Basilica at St Peter's Square, Rome.

Papal Mass with Pope Francis at the Vatican, celebrated 2015 in front of St. Peter's Basilica at St Peter's Square, Rome.

If the mass is celebrated in St Peter's Square, the number accommodated is much larger than the Church. St Peter's Square can host up to 80 000 people.

picture generously provided by Rudolf Kaufmann (2015)