Properties of the Holy See
The properties of the Holy See are regulated by the 1929 Lateran Treaty signed with the Kingdom of Italy. Although part of Italian territory, some of them enjoy extraterritoriality similar to those of foreign embassies, including tax exemptions. Nonetheless, those visiting these properties are generally required to follow the immigration rules of Italy. For example, American seminarians at the Pontifical North American College need an Italian visa, despite residing, and studying, in extraterritorial property of the Holy See.
Outside Vatican City but inside Rome
Extraterritorial property
- Archbasilica of Saint John Lateran
- Basilica of Saint Mary Major
- Basilica of Saint Paul Outside the Walls
- Lateran Palace, Lateran University, the Scala Sancta and adjoining buildings
- Palace of the Holy Office in the Piazza del Sant'Uffizio and adjacent to the Basilica of St. Peter
- Palazzo di Propaganda Fide in the Piazza di Spagna
- Palazzo dei Convertendi, formerly in Piazza Scossacavalli, now in Via della Conciliazione
- Paul VI Audience Hall
- Campo Santo Teutonico
- General Curia of the Order of Saint Augustine
- Gianicolo Hill area properties, namely the Pontifical Urban University, the Pontifical North American College, the Ukrainian Pontifical College of Saint Josaphat, the Romanian Pontifical College and the Bambino Gesù Hospital
- Jesuit Curia Complex
- Palazzo San Callisto – home of the former Pontifical Council Cor Unum
- Palazzo Maffei Marescotti in Via della Pigna off the Corso Vittorio Emanuele II near the Piazza del Gesù
- Palazzo della Cancelleria between the Corso Vittorio Emanuele II and Campo de' Fiori
- Palazzo Pio in Via della Conciliazione
- Pontifical Minor Roman Seminary
Non-extraterritorial property
- Palace of the Holy Apostles attached to the Basilica dei Santi XII Apostoli
- Palace attached to the Church of San Carlo ai Catinari
- Collegio Bellarmino in Via del Seminario near the Church of Sant'Ignazio.
- Archaeological Institute, Pontifical Oriental Institute, Pontifical Lombard Seminary and the Russian College on Piazza Santa Maria Maggiore.
- 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
Outside Rome
Extraterritorial property
- Palace of Castel Gandolfo, the Gardens of the Villa Cybo, Villa Barberini plus adjacent gardens, the summer estate of the Pontificio Collegio Urbano di Propaganda Fide and the papal farm between the towns of Castel Gandolfo and Albano Laziale.
- Area of Santa Maria di Galeria, where the antennae of Vatican Radio are located. The area was ceded by Italy to the Holy See in an agreement in 1951.
Non-extraterritorial property
- The Basilica of the Holy House at Loreto, Province of Ancona.
- The Basilica of St Francis at Assisi, Province of Perugia.
- The Basilica of St Anthony at Padua, Province of Padua.
- The Vatican Advanced Technology Telescope, Graham County, Arizona, US.