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.
Rome
Among the global cities, Rome is unique in having two sovereign entities located entirely within its city limits, the Holy See, represented by the Vatican City State, and the territorially smaller Sovereign Military Order of Malta. The Vatican is an enclave of the Italian capital city and a sovereign possession of the Holy See, which is the Diocese of Rome and the supreme government of the Roman Catholic Church. Rome therefore hosts foreign embassies to the Italian government, to the Holy See, to the Order of Malta and to certain international organizations. Several international Roman Colleges and Pontifical Universities are located in Rome.