Provinces of Belgium
During the second half of the 20th century, Belgium transitioned from a unitary state to a federal state with three Communities and three Regions. As part of the state reforms, the (bilingual) province of Brabant was split in 1995 three ways: into two (unilingual) provinces (Flemish Brabant and Walloon Brabant) and into the (bilingual) Brussels-Capital Region. (The Brussels-Capital Region does not belong to any province, is not a province, and does not contain any provinces.) The two new Brabant provinces became part of the Flemish Region and the Walloon Region respectively. The remaining eight provinces became part of these regions as well, so the Flemish Region and the Walloon Region each contain five provinces.
Chamber of Representatives (Belgium)
Article 62 of the Belgian Constitution fixes the number of seats in the Chamber of Representatives at 150. There are 11 electoral districts, which correspond with the ten Provinces (five Dutch- and five French-speaking) and the Brussels-Capital Region. Prior to the sixth Belgian state reform, the province of Flemish Brabant was divided into two electoral districts: one for Leuven and the other, named Brussels-Halle-Vilvoorde (BHV), which encompassed both the 19 bilingual municipalities from the Brussels-Capital Region and the 35 Dutch-speaking municipalities of Halle-Vilvoorde in Flemish Brabant, including seven municipalities with linguistic facilities for French-speaking inhabitants.