The Brussels-Capital Region is located in the central portion of the country and is a part of both the French Community of Belgium and the Flemish Community but is separate from the Flemish Region and the Walloon Region. Brussels is the most densely populated and the richest region in Belgium in terms of GDP per capita. It covers 162 km , a relatively small area compared to the two other regions, and has a population of over 1.2 million. The five times larger metropolitan area of Brussels comprises over 2.5 million people, which makes it the largest in Belgium. It is also part of a large conurbation extending towards Ghent, Antwerp, Leuven and Walloon Brabant, home to over 5 million people.
The City of Brussels is the location of many national institutions. The Royal Palace, where the King of the Belgians exercises his prerogatives as head of state, is situated alongside Brussels' Park .The Palace of the Nation is located on the opposite side of this park, and is the seat of the Belgian Federal Parliament. The office of the Prime Minister of Belgium, colloquially called Law Street 16 is located adjacent to this building. It is also where the Council of Ministers holds its meetings. The Court of Cassation, Belgium's main court, has its seat in the Palace of Justice. Other important institutions in the City of Brussels are the Constitutional Court, the Council of State, the Court of Audit, the Royal Belgian Mint and the National Bank of Belgium.
The City of Brussels is also the capital of both the French Community of Belgium and the Flemish Community. The Flemish Parliament and Flemish Government have their seats in Brussels, and so do the Parliament of the French Community and the Government of the French Community.