About: Karlsruhe - DBpedia Karlsruhe (/ˈkɑːrlzruːə/, US also /ˈkɑːrls-/, German: [ˈkaʁlsˌʁuːə] ; South Franconian: Kallsruh; formerly spelled Carlsruhe) is the second-largest city of the German federal state of Baden-Württemberg after its capital of Stuttgart, and its 313,092 inhabitants make it the 21st largest city of Germany. On the right bank of the Rhine, the city lies near the French-German border ...