The International Authority for the Ruhr (IAR) was an international body established in 1949 by the Western Allies to regulate the coal and steel industries of the Ruhr area in West Germany. Its seat was in Düsseldorf.

The European Coal and Steel Community (ECSC) was a European organization created after World War II to integrate Europe's coal and steel industries into a single common market based on the principle of supranationalism which would be governed by the creation of a High Authority which would be made up of appointed representatives from the member states who would not represent their national interest, but would take and make decisions in the general interests of the Community as a whole. It was formally established in 1951 by the Treaty of Paris, signed by Belgium, France, Italy, Luxembourg, the Netherlands, and West Germany and was generally seen as the first step in the process of European integration following the end of the Second World War in Europe. The organization's subsequent enlargement of both members and duties ultimately led to the creation of the European Union.