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Legally, Belgium is a sovereign state and a federal constitutional monarchy with a parliamentary system. Its institutional organization is complex and is structured on both regional and linguistic grounds. It is divided into three highly autonomous regions: [https://en.wikipedia.org/wiki/Flemish_Region the Flemish Region] in the north, [https://en.wikipedia.org/wiki/Wallonia Wallonia] in the south, and the [https://en.wikipedia.org/wiki/Brussels Brussels-Capital Region]. Brussels is the smallest and most densely populated region, as well as the richest region in terms of GDP per capita.

== Zones ==