The Permanent Court of Arbitration (PCA) is a non-UN intergovernmental organization headquartered at the Peace Palace, in The Hague, Netherlands. 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 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 122 Contracting Parties. The PCA is not a United Nations agency, but has been a United Nations observer since 1993.

The Pious Fund of the Californias is a fund, originating in 1697, to sponsor the Roman Catholic Jesuit Spanish missions in Baja California, and Franciscan Spanish missions in Alta California in the Viceroyalty of New Spain from 1769 to 1823, and originally administered by the Jesuits. It became the object of litigation between the US and Mexican governments in the 19th century, with the resolution making legal history in The Hague in 1902.