Grand Duchy of Baden State Railway
The construction of the Mannheim–Schwetzingen–Graben Neudorf–Eggenstein–Karlsruhe line via the Hardt forest was funded by the city of Mannheim. It was taken over by the Grand Duchy of Baden State Railway ("Großherzogliche Badische Staatsbahn"), on 4 August 1870, the day of its opening. The line was also known as the Rhine Railway, but there are also old maps that show it as the Rhine Valley Railway.