Brussels and the European Union a provisional seat, though with the Common Assembly in Strasbourg as that was the only city with a large enough hemicycle (the one used by the Council of Europe). This agreement was temporary, and plans were set to relocate the institutions to Saarbrücken which would serve as a "European District", but this did not occur. The 1957 Treaties of Rome established two new communities, the European Economic Community (EEC) and the European Atomic Energy Community (Euratom). These shared the Assembly and Court of the ECSC but created two new sets of Councils and Commissions (equivalent to the ECSC's High Authority).
Special member state territories and the European Union lodged by the United Kingdom with the EEC in 1982, Gibraltarians were to be counted as British nationals for the purposes of Community law. This was notwithstanding that they were not, at the time, British citizens, but were British Overseas Territories citizens with the right to be registered as British citizens. As such, Gibraltarians have enjoyed European Community treaty rights since UK's accession to the European Community, and subsequently European Union citizenship since the Maastricht Treaty. It was not until 21 May 2002 when Gibraltarians who did not apply for British citizenship were automatically granted British citizenship while still retaining