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.
Municipalities of Belgium
Because of the specific nature of the reorganization in Antwerp, the law of December 30, 1975 didn't enter into force for Antwerp until January 1, 1983. The formerly independent municipalities were called districts and were given an advisory function. However, on January 1, 2001 they were given an administrative function again. The merger of Antwerp with the municipalities of Berchem, Borgerhout, Deurne, Hoboken, Ekeren, Merksem and Wilrijk in 1983 finally reduced the number of municipalities in Belgium to 589 and was the last reorganization of the municipalities for several decades because the merger of the 19 municipalities of Brussels was postponed indefinitely.