European Union and West Germany signed the Treaty of Rome, which created the European Economic Community (EEC) and established a customs union. They also signed another pact creating the European Atomic Energy Community (Euratom) for co-operation in developing nuclear energy. Both treaties came into force in 1958. The EEC and Euratom were created separately from the ECSC, although they shared the same courts and the Common Assembly. The EEC was headed by Walter Hallstein (Hallstein Commission) and Euratom was headed by Louis Armand (Armand Commission) and then Étienne Hirsch. Euratom was to integrate sectors in nuclear energy while the EEC would develop
Treaty of Rome full name of which was the Treaty establishing the European Economic Community has been amended by successive treaties significantly changing its content. The 1992 Treaty of Maastricht established the European Union, the EEC becoming one of its three pillars, the European Community. Hence, the treaty was renamed the Treaty establishing the European Community (TEC). When the Treaty of Lisbon came into force in 2009, the pillar system was abandoned; hence, the EC ceased to exist as a legal entity separate from the EU. This led to the treaty being amended and renamed as the Treaty on the Functioning of the