Brussels (French: Bruxelles); Dutch: Brussel), officially the Brussels Region or Brussels-Capital Region (French: Région de Bruxelles-Capitale), is the de facto capital of Belgium and of the European Union (EU). It is also the largest urban area in Belgium, comprising 19 municipalities, including the municipality of the City of Brussels, which is the de jure capital of Belgium, in addition to the seat of the French Community of Belgium and of the Flemish Community.
Brussels has grown from a 10th-century fortress town founded by a descendant of Charlemagne into a metropolis of more than one million inhabitants. The metropolitan area has a population of over 1.8 million, making it the largest in Belgium.