 The arrondissement was created in 1963 upon the splitting of the arrondissement of Brussels into the capital one and the surrounding arrondissement of Halle-Vilvoorde.They remained part of the province of Brabant until it was split as well in 1995.In that year, the arrondissement of Nijvel formed the new Walloon Brabant and the arrondissements of Halle-Vilvoorde and Leuven formed the new Flemish Brabant.