Brussels, officially the Brussels-Capital Region, is a region of Belgium comprising 19 municipalities, including the City of Brussels, which is the capital of Belgium. 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 km², 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.
Brussels grew from a small rural settlement on the river Senne to become an important city-region in Europe. Since the end of the Second World War, it has been a major centre for international politics and home to numerous international organisations, politicians, diplomats and civil servants.