A little 100 meters down the hill and southeast of the Porta praetoria was in the corridor "Brühl" at its discovery in 1896 well-preserved 16 × 44 meter row bath of the West fort. With apodyterium (dressing room), frigidarium (cold water bath) with bath, tepidarium (hot air room) , caldarium (warm water basin) and a large Praefurnium (boiler room). There, the air was heated for Hypokaustheizung