|Pillars of the European Union|
|European Coal and Steel Community||1952–2002|
|European Economic Community||1958–2009|
|European Atomic Energy Community||1958–present|
The European Communities (EC), were three international organizations. These were the European Coal and Steel Community (ECSC), the European Atomic Energy Community (EAEC), and the European Economic Community (EEC). In 1993, the European Union was formed by the Maastricht Treaty.