Outside Rome
- Pontifical Palace, Villa Barberini and the Villa Cybo (plus adjacent gardens) in the town of Castel Gandolfo (around 55 hectares or 140 acres).
Each of those two areas is actually larger than Vatican City itself.
The Fundamental Accord, signed in 1993, grants property rights and tax exemptions to the Holy See over various Christian holy sites in Israel, but the agreement was never finalized because of diplomatic problems between the Vatican and Israeli governments.
Read more about this topic: Properties Of The Holy See