The Arrondissement of Halle-Vilvoorde was established in 1963 when the language borders were determined. At that time, the then Administrative Arrondissement of Brussels, which had the same territory as the present-day
Judicial Arrondissement of Brussels, was split into three administrative arrondissements, two of which still exist today: •
Brussels-Capital, which consists of the 19 municipalities of the
Brussels Region; • Halle-Vilvoorde, a unilingual Dutch-speaking administrative arrondissement; •
Brussels-Periphery, which consisted of the six Flemish
municipalities with language facilities for French-speakers around Brussels. On January 1, 1971, the Arrondissement of Brussels-Periphery ceased to exist and its municipalities were added to Halle-Vilvoorde. In 1977, the then municipality of
Muizen ceased to exist and was ceded to the
Arrondissement of Mechelen, in the
Province of
Antwerp. ==Municipalities==