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 organisations. Several international Roman Colleges and Pontifical Universities are located in Rome.