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
Central European Iron Trail Central European Iron Trail The Central European Iron Trail is a European Cultural Route which combines local iron routes with institutions as well as places that represent important parts of the European iron cultural heritage. The aim of the route is to increase understanding of the history, the culture and the traditions of the Central European iron areas in 8 countries. The “Central European Iron Trail” was recognised as a “cultural route of the Council of Europe” in 2007. Following a suggestion by the "European Iron Trail" working group, a project for an iron route on a European scale was