The United Nations System consists of the United Nations' six principal bodies, the Specialized Agencies and related organizations. The UN System includes subsidiary bodies such as the separately administered funds and programmes, research and training institutes, and other subsidiary entities. Some of these organizations predate the founding of the United Nations in 1945 and were inherited after the dissolution of the League of Nations.
The United Nations Office at Geneva (Switzerland) is the second biggest UN centre, after the United Nations Headquarters (New York City).
Image: UN General Assembly hall
Image: United Nations Headquarters in New York City, view from Roosevelt Island
Image: International Court of Justice HQ 2006
The United Nations (UN) is a diplomatic and political international organization whose stated purposes are to maintain international peace and security, develop friendly relations among nations, achieve international cooperation, and serve as a centre for harmonizing the actions of nations. It is the world's largest international organization. The UN is headquartered in New York City, and the UN has other offices in Geneva, Nairobi, Vienna, and The Hague, where the International Court of Justice is headquartered at the Peace Palace.
1943 sketch by Franklin Roosevelt of the UN original three branches: The Four Policemen, an executive branch, and an international assembly of forty UN member states
Dag Hammarskjöld was a particularly active secretary-general from 1953 until he died in 1961.
Kofi Annan, secretary-general from 1997 to 2006
Flags of member nations at the United Nations Headquarters, seen in 2007