Most Belgian municipalities are made up of former municipalities that were merged in the past. Called deelgemeenten, they do not have any political function, and limited administrative use, as only the current, "larger" municipalities have elected councils.
However, Article 41 of the Belgian Constitution provides for the possibility of implementing districts for any municipality with at least 100,000 inhabitants. In such cases, the districts have elected "district councils" and a "district college", but only Antwerp has made use of that provision.