The department came into existence in 1795, when the Southern Netherlands were occupied by the French. It was formed from most of the county of Namur and parts of the bishopric of Liège and the duchies of Brabant and Luxembourg.
After Napoleon was defeated in 1814, the department became part of the United Kingdom of the Netherlands. Its territory is now divided between the Belgian provinces of Namur and Luxembourg (a small part).
- Namur, cantons: Andenne, Dhuy, Fosses, Gembloux and Namur (2 cantons).
- Dinant, cantons: Beauraing, Ciney, Dinant, Florennes and Walcourt.
- Marche, cantons: Durbuy, Erezée, Havelange, La Roche, Marche and Rochefort.
- Saint-Hubert, cantons: Gedinne, Nassogne, Saint-Hubert and Wellin.