ancient roman thermal baths excavation site

access accessible ancient antique archaeological archaeology archeological archeology architectural architecture attraction bath bathhouse baths bavaria building caldaria caldarium calidarium channel complex construction display displayed engineering excavated excavation feature germany ground hall heating heritage historic historical history hot hypocaust indoor inside interior landmark masonry method modern museum premises preservation preserved protected protection remains roman romans room ruins sight site spa stack stacked stone structure sunk system thermal tiles tourist touristic underfloor wall weissenburg works