Properties of the Holy See, as agreed in the 1929 Lateran Treaty.

• property of the Holy See outside Vatican City but in the City of Rome
  • Basilica of St. John Lateran (San Giovanni in Laterano)
  • Basilica of St. Mary Major (Santa Maria Maggiore)
  • Basilica of St. Paul outside the Walls (San Paolo fuori le Mura), including the monastery
  • Palace of St Callixtus (San Callisto)
  • Sal Gianicola & including that belonging to the Sacred College of Propaganda Fide.
  • Palace of the Holy (Roman) 12 Apostles attached to the Basilica of the Holy Apostles.
  • Palace attached to the Church of San Carlo Catinari
  • Palace of the Datari near the Quirinal Palace.
  • Palace of the Cancelleria between the Corso Vittorio Emanuel & the Campo Di Fiori.
  • Palace of the Propaganda Fide on the Spanish Square.
  • Palace of the Holy Office (Sant'Offizio) adjacent to the Piazza San Pietro at Porto Cavalleggeri.
  • Palace of the Congregation of the Oriental Church, formerly Palace of the Convertendi in Piazza San Cossacavalli.
  • Palace of the Vicariato in Via Della Pigna off the Corso Vittorio Emanuele near the Piazza Del Gesù
  • Gregorian University in Via Del eminario near the Church of Sant'Ignazio.
  • Gregorian University Alla Pilotta facing on Piazza Di Pilotta.
  • Biblical Institute on Piazza Di Pilotta.
  • Archaeological Institute, Oriental Institute, Lombard College & the Russian College on Piazzas Santa Maria Maggiore.
  • The two Palaces of Sant'Apollinare between the Piazza Sant'Apollinare & Via Della Serola.
  • The House of Retreat for the Clergy of Saints John & Paul, including the Nympheum of Nero, on the Caelan Hill.

• properties of the Holy See outside Rome are
  • Pontifical Palace & Villa Barberini in the town of Castel Gandolfo.

• The following properties were ceded to the Holy See:
  • The Basilica of the Holy House (Santa Casa) 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.