The two Palaces of Sant'Apollinare between the Piazza Sant'Apollinare and Via della Serola.
The House of Retreat for the Clergy of Saints John and Paul, including the Nympheum of Nero, on the Caelian Hill.
Former extraterritorial property
Palazzo della Datarìa near the Quirinal Palace (not a property of the Holy See anymore; exchanged for Palazzo Pio)
Extraterritorial property of the Holy See in Castel Gandolfo: 1. Papal palace with adjacent garden 2. Garden of the Villa Cybo 3. Villa Barberini, gardens and agricultural area 4. Oliveto ex-Bacelli 5. Church of San Tommaso di Villanova
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.