Six founding countries signed the Treaty of Paris in 1951 to form the European Coal and Steel Community (ECSC).A single market in coal and steel was to be set up among signatory countries.

• 1951年六个创建国签订了巴黎条约，组建欧洲煤炭钢铁联营，签约国之间建立了单一的煤炭钢铁市