The Treaties of Rome are two of the treaties of the European Union signed on March 25, 1957. Both treaties were signed by The Six: Belgium, France, Italy, Luxembourg, the Netherlands and West Germany.
The first established the European Economic Community (EEC) and the second established the European Atomic Energy Community (EAEC or Euratom). They were the first international organisations to be based on supranationalism, after the European Coal and Steel Community (ECSC) established a few years prior.
The treaties came into force on 1 January 1958 and the EEC treaty has been amended on numerous occasions (see Treaties of the European Union); It has since been renamed from The Treaty establishing the European Economic Community to the The Treaty establishing the European Community. However the Euratom treaty has seen very little amendment due to the later sensitivity surrounding atomic energy amongst the European electorate.