the springs of baden-baden were known to the romans, and the foundation of the town is referred to the emperor hadrian by an inscription of somewhat doubtful authenticity. the name of aurelia aquensis was given to it in honour of aurelius severus, in whose reign it would seem to have been well known. fragments of its ancient sculptures are still to be seen, and in 1847 remains of roman vapour baths, well preserved, were discovered just below the new castle.