Languages of the European Union which is understood by 51% of all adults, while German is the most widely used mother tongue, spoken by 18%. All 24 official languages of the EU are accepted as working languages, but in practice only two – English and French – are in wide general use and of these English is the more commonly used. French is an official language in all three of the cities that are political centres of the Union: Brussels (Belgium), Strasbourg (France) and Luxembourg City (Luxembourg). , the official languages of the European Union, as stipulated in the latest amendment of "Regulation No 1
Seat of the European Parliament in Strasbourg official home. The Parliament's five buildings, all named after distinguished European politicians, are located in the "Quartier Européen" (European Quarter) of the city, which it shares with other European organisations which are separate from the European Union's. Previously the Parliament used to share the same assembly room as the Council of Europe. Today, the principal building is the Louise Weiss building, inaugurated in 1999. The Louise Weiss building (IPE 4) (named after Louise Weiss, a French former member of the parliament), is located in the Wacken district of Strasbourg, south of Schiltigheim, between the 1920s workers' suburban colony ("Cité ouvrière")