United Nations agency in the context of "United Nations Headquarters"

The Office of the United Nations High Commissioner for Refugees (UNHCR) is a United Nations agency mandated to aid and protect refugees, forcibly displaced communities, and stateless people, and to assist in their voluntary repatriation, local integration or resettlement to a third country. It is headquartered in Geneva, Switzerland, and has 20,305 staff working in 136 countries as of December 2023.

The Permanent Court of Arbitration (PCA) is an intergovernmental organization headquartered at the Peace Palace, in The Hague, The Netherlands, which was built to house the PCA. Unlike a judicial court in the traditional sense, the PCA provides administrative support in international arbitrations involving various combinations of States, State entities, international organizations and private parties. The cases span a wide range of legal issues involving territorial and maritime boundaries, sovereignty, human rights, international investment, and international and regional trade. The PCA is constituted through two separate multilateral conventions with a combined membership of 126 Contracting Parties. The PCA is not a United Nations agency,but has been a United Nations observer since 1993.

The PCA was established by the Convention for the Pacific Settlement of International Disputes, concluded at The Hague in 1899 during the first Hague Peace Conference of 1899. The Conference had been convened at the initiative of Tsar Nicholas II of Russia "with the object of seeking the most objective means of ensuring to all peoples the benefits of a real and lasting peace, and above all, of limiting the progressive development of existing armaments".