adjacent former Vatican Fields, where St. Peter's Basilica, the Apostolic Palace, the Sistine Chapel, and museums were built, along with various other buildings. The area was part of the Roman rione of Borgo until 1929. Being separated from the city on the west bank of the Tiber river, the area was an outcrop of the city that was protected by being included within the walls of Leo IV, later expanded by the current fortification walls of Paul III/Pius IV/Urban VIII.
The Basilica di Santa Maria Maggiore is one of the largest churches in the city.
When the Lateran Treaty of 1929 that gave the state its present form was being prepared, the boundaries of the proposed territory was influenced by the fact that much of it was all but enclosed by this loop. For some tracts of the frontier, there was no wall, but the line of certain buildings supplied part of the boundary, and for a small part of the frontier a modern wall was constructed.
The territory includes Saint Peter's Square, separated from the territory of Italy only by a white line along the limit of the square, where it touches Piazza Pio XII. St. Peter's Square is reached through the Via della Conciliazione, which runs from the Tiber River to St. Peter's. This grand approach was constructed by Benito Mussolini after the conclusion of the Lateran Treaty. According to the Lateran Treaty, certain properties of the Holy See that are located in Italian territory, most notably Castel Gandolfo and the major basilicas, enjoy extraterritorial status similar to that of foreign embassies.
In recent years, there has been a significant growth in Rome's Muslim community, mainly due to immigration from North African and Middle Eastern countries into the city. As a consequence of this increase of the local practitioners of the Islamic faith, the comune promoted the building of the largest mosque in Europe, which was designed by architect Paolo Portoghesi and inaugurated on 21 June 1995. Since
