The Kingdom of Belgium (Dutch
, French Royaume de Belgique) is a federal state in Western Europe. It is located between the North Sea and the Ardennes and borders the Netherlands, Germany, Luxembourg and France. Belgium has about 11.4 million inhabitants (2018) in an area of 30,688 square kilometres. With 374 inhabitants per km², Belgium is one of the most densely populated countries. Belgium's level of urbanization is the highest in Europe at nearly 98 percent. The city of Brussels is the capital and seat of the Belgian royal family as well as the centre of the largest agglomeration. The most populous city is Antwerp; other major cities are Ghent, Charleroi, Liège, Bruges and Namur.
Since independence in 1830 and constitutionalization in 1831, Belgium has been a hereditary parliamentary monarchy (see also Belgian monarchy). The north of the country with the Flemish is Dutch, the south with the Walloons French language area (see Flemish and French Community). The Brussels-Capital Region is officially bilingual, but with a majority Francophone population. In the German-speaking area of East Belgium, Standard German and West Middle German dialects are widespread (cf. German-speaking Community).
The Flemish-Walloon conflict, which has been ongoing since the 19th century, has shaped the often conflicting interests of the representatives of the two large population groups in Belgian politics. Since the 1970s, therefore, attempts have been made to counter this problem by decentralising the organisation of the state. To this end, Belgium was transformed into a federal state consisting of three regions and three communities. The regions of Flanders, Wallonia and Brussels-Capital, as well as the Flemish, French and German-speaking Communities, have since formed the basic political structure of the country. Belgium's state structure is considered to be complex because, among other things, the territories of the regions do not coincide with those of the communities. For example, the competences of the French and Flemish Communities overlap in the officially bilingual Brussels Region, and the small territory of the German-speaking Community belongs to the majority French-speaking Walloon Region.
Belgium is a founding member of the European Economic Community (EEC), now the European Union (EU), whose main institutions are based in its capital, Brussels. Belgium is also a member of the Benelux Economic Union, along with the Netherlands and Luxembourg.


