Holy See member of UNESCO
Diplomacy
Since medieval times the episcopal see of Rome has been recognized as a sovereign entity. The Holy See (not the State of Vatican City) maintains formal diplomatic relations with and for the most recent establishment of diplomatic relations with 183 sovereign states, and also with the European Union, and the Sovereign Military Order of Malta, as well as having relations of a special character with the Palestine Liberation Organization; 69 of the diplomatic missions accredited to the Holy See are situated in Rome. The Holy See maintains 180 permanent diplomatic missions abroad, of which 74 are non-residential, so that many of its 106 concrete missions are accredited to two or more countries or international organizations. The diplomatic activities of the Holy See are directed by the Secretariat of State (headed by the Cardinal Secretary of State), through the Section for Relations with States. There are 13 internationally recognized states with which the Holy See does not have relations. The Holy See is the only European subject of international law that has diplomatic relations with the government of the Republic of China (Taiwan) as representing China, rather than the government of the People's Republic of China (see Holy See–Taiwan relations).
The British Foreign and Commonwealth Office speaks of Vatican City as the "capital" of the Holy See, although it compares the legal personality of the Holy See to that of the Crown in Christian monarchies and declares that the Holy See and the state of Vatican City are two international identities. It also distinguishes between the employees of the Holy See (2,750 working in the Roman Curia with another 333 working in the Holy See's diplomatic missions abroad) and the 1,909 employees of the Vatican City State. The British Ambassador to the Holy See uses more precise language, saying that the Holy See "is not the same as the Vatican City State. ... (It) is the universal government of the Catholic Church and operates from the Vatican City State." This agrees exactly with the expression used by the website of the United States Department of State, in giving information on both the Holy See and the Vatican City State: it too says that the Holy See "operates from the Vatican City State".The Holy See is a member of various international organizations and groups including the International Atomic Energy Agency (IAEA), International Telecommunication Union, the Organization for Security and Co-operation in Europe (OSCE), the Organisation for the Prohibition of Chemical Weapons (OPCW) and the United Nations High Commissioner for Refugees (UNHCR). The Holy See is also a permanent observer in various international organizations, including the United Nations General Assembly, the Council of Europe, UNESCO (United Nations Educational, Scientific and Cultural Organization), the World Trade Organization (WTO), and the Food and Agriculture Organization (FAO).Relationship with Vatican City and other territories
The Holy See participates as an observer to African Union, Arab League, Council of Europe, the Non-Aligned Movement (NAM), Organization of American States, International Organization for Migration and in the United Nations and its agencies FAO, ILO, UNCTAD, UNEP, UNESCO, UN-HABITAT, UNHCR, UNIDO, UNWTO, WFP, WHO, WIPO.  and as a full member in IAEA, OPCW, Organization for Security and Co-operation in Europe (OSCE).
Although the Holy See is closely associated with Vatican City, the independent territory over which the Holy See is sovereign, the two entities are separate and distinct. After the Italian seizure of the Papal States in 1870, the Holy See had no territorial sovereignty. In spite of some uncertainty among jurists as to whether it could continue to act as an independent personality in international matters, the Holy See continued in fact to exercise the right to send and receive diplomatic representatives, maintaining relations with states that included the major powers Russia, Prussia, and Austria-Hungary. Where, in accordance with the decision of the 1815 Congress of Vienna, the Nuncio was not only a member of the Diplomatic Corps but its dean, this arrangement continued to be accepted by the other ambassadors. In the course of the 59 years during which the Holy See held no territorial sovereignty, the number of states that had diplomatic relations with it, which had been reduced to 16, actually increased to 29.The State of the Vatican City was created by the Lateran Treaty in 1929 to "ensure the absolute and visible independence of the Holy See" and "to guarantee to it indisputable sovereignty in international affairs." Archbishop Jean-Louis Tauran, the Holy See's former Secretary for Relations with States, said that Vatican City is a "minuscule support-state that guarantees the spiritual freedom of the pope with the minimum territory".The Holy See, not Vatican City, maintains diplomatic relations with states. Foreign embassies are accredited to the Holy See, not to Vatican City, and it is the Holy See that establishes treaties and concordats with other sovereign entities. When necessary, the Holy See will enter a treaty on behalf of Vatican City.
Under the terms of the Lateran Treaty, the Holy See has extraterritorial authority over various sites in Rome and two Italian sites outside of Rome, including the Pontifical Palace at Castel Gandolfo. The same authority is extended under international law over the Apostolic Nunciature of the Holy See in a foreign country.
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