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).
Economic history of Spain also lobbied successfully for Spain to join the European Economic Community (EEC) and to remain part of the North Atlantic Treaty Organization. The European Union at the time Spain joined, in 1986, existed primarily as a trading union - the EEC, and better trade links were vital to the fragile Spanish economy. Unemployment was high, about 18 percent, and the Spanish GDP was 71 percent of the EU average. The single market and European funding offered a chance to bring the Spanish economy up to the standards of the rest of Western Europe, along with the support of Spain's wealthier