Vatican City
Vatican City has a reasonably well-developed transport network considering its size (consisting mostly of a piazza and walkways). A state that is long and wide, it has a small transportation system with no airports or highways. The only aviation facility in Vatican City is the Vatican City Heliport. Vatican City is one of the few independent countries without an airport, and is served by the airports that serve the city of Rome, Leonardo da Vinci-Fiumicino Airport, and to a lesser extent Ciampino Airport.
Papal States
Despite the fact that the traditionally Catholic powers did not come to the pope's aid, the papacy rejected any substantial accommodation with the Italian Kingdom, especially any proposal which required the pope to become an Italian subject. Instead the papacy confined itself (see Prisoner in the Vatican) to the Apostolic Palace and adjacent buildings in the loop of the ancient fortifications known as the Leonine City, on Vatican Hill. From there it maintained a number of features pertaining to sovereignty, such as diplomatic relations, since in canon law these were inherent in the papacy. In the 1920s, the papacy – then under Pius XI—renounced the bulk of the Papal States, and the Lateran Treaty with Italy (then ruled by the National Fascist Party under Benito Mussolini) was signed on February 11, 1929, creating the State of the Vatican City, forming the sovereign territory of the Holy See, which was also indemnified to some degree for loss of territory.