Karlsruhe (, , formerly spelled Carlsruhe) is the second-largest city of the German federal state of Baden-Württemberg after its capital of Stuttgart, and its 309,999 (2016) inhabitants make it the 21st largest city of Germany. On the right bank of the Rhine, the city lies near the French-German border, between the Mannheim/Ludwigshafen conurbation to the north, and the Strasbourg/Kehl conurbation to the south. It is the largest city of Baden, a region named after Hohenbaden Castle in the city of Baden-Baden. Karlsruhe is also the largest city in the South Franconian dialect area (transitional dialects between Central and Upper German), the only other larger city in that area being Heilbronn. The city is the seat of the Federal Constitutional Court (Bundesverfassungsgericht), as well as of the Federal Court of Justice (Bundesgerichtshof) and the Public Prosecutor General of the Federal Court of Justice (Generalbundesanwalt beim Bundesgerichtshof).