Braine-l'Alleud is a municipality of Wallonia, in the province of Walloon Brabant, Belgium, about 20 kilometres south of Brussels. The municipality consists of the following districts: Braine-l'Alleud, Lillois-Witterzée, and Ophain-Bois-Seigneur-Isaac. Bordering Flanders, the town is home to a minority of Dutch speakers. The famous Lion of Waterloo, where the eponymous battle took place, is in the territory of Braine-l'Alleud.