A special feature is the large bathhouse ( Balineum ) of Niederbieber dar. It was not - as in Roman military camps actually common - outside the camp, but was integrated into the Retentura (rear camp ), within which it is just east of the Via Decumana and north of the Principia . And it was especially large and elaborately designed. The bricks in the bath, with stamps of Legio VIII Augusta lying in Argentoratum ( Strasbourg ), were either delivered here or erected by a Legion construction team. [33]The Balineum built directly with the Commodus castle testifies to the great commitment of the Strasbourg legion on the Limes. The immediate use of this troop could, for example, at the same time be inscribed on the cultivation of the fort Osterburken