The city of Luxembourg (Luxembourgish: Lëtzebuerg, German: Luxemburg), also known as Luxembourg City (Luxembourgish: Stad Lëtzebuerg, French: Ville de Luxembourg, German: Stadt Luxemburg), is a commune with city status, and the capital of the Grand Duchy of Luxembourg. It is located at the confluence of the Alzette and Pétrusse Rivers in southern Luxembourg. The city contains the historic Luxembourg Castle, established by the Franks in the Early Middle Ages, around which a settlement developed.