<P> The European Parliament's buildings are located to the south between Leopold Park and Luxembourg Square, over Brussels - Luxembourg Station which is underground . The complex, known as the "Espace Léopold" (or "Leopoldsruimte" in Dutch), has two main buildings: Paul - Henri Spaak and Altiero Spinelli which cover 372,000 m (4,004,175 sq ft). The complex is not the official seat of the Parliament with its work being split with Strasbourg (its official seat) and Luxembourg (its secretariat). However the decision making bodies of the Parliament, along with its committees and some of its plenary sessions, are held in Brussels to the extent that three quarters of its activity take place in Brussels . The Parliament buildings were extended with the new D4 and D5 buildings being completed and occupied in 2007 and 2008 . It is believed the complex now provides enough space for Parliament with no major new building projects foreseen . </P> <P> The European External Action Service has been based in the Triangle building since 1 December 2010 . </P> <P> The Economic and Social Committee and the Committee of the Regions together occupy the Delors building, which is next to Leopold Park and used to be occupied by the Parliament . They also use the office building Bertha von Suttner . Both buildings were named in 2006 . Brussels also hosts two agencies, the European Defence Agency (located on Rue des Drapiers / Lakenweversstraat) and the Executive Agency for Competitiveness and Innovation--(in Madou Tower). There is also EUROCONTROL, a semi-EU air traffic control agency covering much of Europe and the Western European Union which is a non-EU military organisation which is merging into the EU's CFSP . </P> <P> The EU presence in Brussels has created significant social and economic impact . Jean - Luc Vanraes (nl), member of the Brussel parliament responsible for the city's external relations, goes as far to say the prosperity of Brussels "is a consequence of the European presence". As well as the institutions themselves, large companies are drawn to the city due to the EU presence . In total about 10% of the city has a connection to the international community . </P>

The headquarters of european union are at brussels