The casemate from Vienna's former city wall, some of which dates back many centuries, now lies beneath the palace. Conference rooms and event rooms with extraordinary flair have now been created here. Recessed floor luminaires add dramatic scenic lighting to the historical vaulting. The lighting here, as in the entire hotel complex, is controlled by an ERCO Controls system: programmed light scenes to suit the occasion can be recalled via the ERCO Control Pad's touch screen.