Nivelles is a city and municipality of Wallonia located in the Belgian province of Walloon Brabant. The Nivelles municipality includes the former municipalities of Baulers, Bornival, Thines, and Monstreux.

Walloon Brabant is a province located in Belgium's French-speaking region of Wallonia. It borders on the province of Flemish Brabant and the provinces of Liège, Namur and Hainaut. Walloon Brabant's capital and largest city is Wavre.