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The Palais des Nations from outside, with a view on the Nations Gate, the alley of flags and one of the old buildings.

The United Nations Office at Geneva (UNOG), housed at the historic Palais des Nations, is the second largest United Nations centre after the United Nations Headquarters in New York. The facility, an outstanding testimony to twentieth century architecture, is situated in the beautiful Ariana park in Geneva, Switzerland. 

The Palais des Nations is one of the largest diplomatic conference centers globally. Around 8,000 meetings are organized each year. Most conference rooms date back to the original construction of the Palais des Nations in the 1930s.

History of the Palais

The League of Nations, known as the predecessor of the United Nations, initially established its Secretariat in the Hôtel National building, today known as Palais Wilson, along the shores of Lake Geneva. During the extraordinary session held in 1926 to discuss Germany's admission to the League, the Assembly approved an international architectural competition for the construction of the Palais des Nations, the future home of the League of Nations.

In 1927, 377 architectural projects were submitted to the League of Nations. As it was impossible to reach a unanimous agreement on a single submission, five architects were appointed to work on a common project: Julien Flegenheimer of Switzerland, Camille Lefèvre and Henri-Paul Nénot of France, Carlo Broggi of Italy and József Vágó of Hungary. Though not included in the original design, a library was incorporated into the architectural project, thanks to a US $2 million donation from John D. Rockefeller Jr.

With the inclusion of a library, the League of Nations needed to find a larger parcel of land than originally planned along the shores of Lake Geneva. Ultimately, through an exchange with the City of Geneva, the Palais found its home in the 46-hectare Ariana Park. The Park had been bequeathed to the City of Geneva by Gustave Revilliod upon his death in 1890, as the last descendent of the Revilliod de la Rive family.  

Built in the art deco style of the times, the foundation stone of the Palais was ceremoniously laid in Ariana Park on 7 September 1929. Beneath the stone is a casket containing a list of the League of Nations Member States, a copy of the Covenant of the League and coins of all the countries represented at its Tenth Assembly. The League of Nations moved its headquarters to the Palais des Nations in 1936.

Though dissolved at a final Assembly held in Geneva in April 1946, the League of Nations handed over its properties and assets to the United Nations Organization, the Palais des Nations being its crown jewel. While the headquarters of the new Organization was established in New York, the European Office of the United Nations was created in the Palais des Nations.

Building Statistics

Construction Dates
  • Construction of the League of Nations building: 1929-1938
  • Secretariat – Council – Assembly Hall – Library
  • First extension: 1950 – 1952
  • Construction of Building K and D wing
  • Second extension: 1968 – 1973
  • Construction of Building E
  • Pregny Gate, Chemin de Fer Gate & Nations Gate: 2003 – 2004
  • Construction of Building H: 2018 – 2021
  • Peace Gate: 2021 – 2022
  • Length of the buildings (Geneva-Lausanne): 850 meters
  • Building surface: 206,345 square meters
  • Number of doors: 54
  • Number of conference rooms: 34
  • Number of elevators: 59
  • Size of Ariana parc: 46 hectares
  • Number of trees inside the Ariana parc: 1,350