Institutional seats of the European Union are based in Luxembourg City along with the European Investment Bank. The Economic and Social Committee and the Committee of the Regions are entirely based in Brussels while the European Central Bank is based in Frankfurt and Europol is the only agency to have its seat fixed by the treaties, in The Hague. Separately, the Treaty of Nice establishes Brussels as the venue for all formal summits of the European Council after 2004. However some extraordinary sessions are sometimes held outside the city. The European Council's seat is however fixed by a declaration rather than a protocol, meaning it is
European Financial Stability Facility European Financial Stability Facility The European Financial Stability Facility (EFSF) is a special purpose vehicle financed by members of the eurozone to address the European sovereign-debt crisis. It was agreed by the Council of the European Union on 9 May 2010, with the objective of preserving financial stability in Europe by providing financial assistance to eurozone states in economic difficulty. The Facility's headquarters are in Luxembourg City, as are those of the European Stability Mechanism. Treasury management services and administrative support are provided to the Facility by the European Investment Bank through a service level contract. Since the establishment of