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 Initiative 2010 Montenegro - 2011 Serbia - 2012 Ukraine - 2013 Hungary - 2014 Austria - 2015 Macedonia - 2016 Bosnia and Herzegovina. - 2017 Belarus - 2018 Croatia Founding members: Joined later: Central European Initiative The Central European Initiative (CEI) is a forum of regional cooperation in Central and Eastern Europe, counting 18 member states. It was formed in Budapest in 1989. The CEI headquarters have been in Trieste (Italy) since 1996. The Central European Initiative or CEI, is the largest and oldest forum of regional cooperation in Central, Eastern and South Eastern Europe. It now counts 18 member states,