History of the European Union Europe Declaration (1951). This principle was at the heart of the European Coal and Steel Community (ECSC) (1951), the Treaty of Paris (1951), and later the Treaty of Rome (1958) which established the European Economic Community (EEC) and the European Atomic Energy Community (EAEC). Both the ECSC and EEC were later incorporated into the European Union while the EAEC maintains a distinct legal identity despite sharing members and institutions. The Maastricht Treaty (1992) created the European Union with its pillars system, including foreign and home affairs alongside the European Community. This in turn led to the creation of the single
Historical Archives of the European Union and Steel Community (ECSC), the European Economic Community (EEC), the European Atomic Energy Community (Euratom), the Common Assembly of the ECSC, the European Parliamentary Assembly, the Court of Justice of the European Union, the Economic and Social Committee, the Court of Auditors, and the European Investment Bank. It also holds private deposits and collections from individuals, organisations and associations that advocated, supported and implemented the Post-World War II European conciliation and integration process. These holdings include the archival papers of the European Space Agency (ESA), the Assembly of Western European Union (WEU), the European Council for Municipalities and Regions (CCRN),