Treaty of Rome in 2009, the Treaty of Lisbon renamed it the "Treaty on the Functioning of the European Union". The TFEU originated as the treaty establishing the European Economic Community (the EEC treaty), signed in Rome on 25 March 1957. On 7 February 1992, the Maastricht treaty, which led to the formation of the European Union, saw the EEC Treaty renamed as the Treaty establishing the European Community (TEC) and renumbered. The Maastricht reforms also saw the creation of the European Union's three pillar structure, of which the European Community was the major constituent part. Following the 2005 referenda, which saw the
Merger Treaty Merger Treaty The Merger Treaty (or Brussels Treaty) was a European treaty which combined the three executive bodies of the European Coal and Steel Community (ECSC), European Atomic Energy Community (Euratom) and the European Economic Community (EEC) into a single institutional structure. The treaty was signed in Brussels on 8 April 1965 and came into force on 1 July 1967. It set out that the Commission of the EEC and the Council of the EEC should replace the Commission and Council of Euratom and the High Authority and Council of the ECSC. Although each Community remained legally independent, they shared