Ourthe was a department of the French First Republic and French First Empire in present-day Belgium and Germany. It was named after the river Ourthe (Oûte). Its territory corresponded more or less with that of the present-day Belgian province of Liège and a small adjacent region in North Rhine-Westphalia in Germany. It was created on 1 October 1795, when the Austrian Netherlands and the Prince-Bishopric of Liège were officially annexed by the French Republic. Before this annexation, the territory included in the department had lain partly in the Prince-Bishopric of Liège, the Abbacy of Stavelot-Malmedy, the Duchies of Limburg and Luxembourg, and the County of Namur.