History of the United Nations $8.5 million donation from John D. Rockefeller, Jr. The UN headquarters officially opened on January 9, 1951, although construction was not formally completed until October 9, 1952. Under special agreement with the United States, the UN enjoys certain diplomatic privileges and immunities, but generally the laws of New York City, New York State, and the United States apply. While the principal headquarters of the UN remain in New York City, major agencies base themselves in Geneva, The Hague, Vienna, Nairobi and elsewhere. The basic constitutional makeup of the United Nations has changed little, though vastly increased membership has altered the
Brazil and the United Nations United Nations Educational, Scientific and Cultural Organization (UNESCO) headquarters in Paris, the Permanent Delegation of Brazil is headed by Ambassador Marcia Donner Abreu. Brazil joined UNESCO in 1946, and has been a member of its executive board several times, most recently 2007–09. Brazil and the United Nations Federative Republic of Brazil is a founding member of the United Nations and participates in all of its specialized agencies. Brazil is among the twenty top contributors to United Nations peacekeeping operations, and has participated in peacekeeping efforts in the Middle East, the former Belgian Congo, Cyprus, Mozambique, Angola, and more recently East