hot halls of the house of hippolytus, complutum, a roman city located in alcala de henares, madrid, spain

alcala henares archaeology complutum house hippolytus madrid region roman spain stone archaeological europe city rome oven hot halls baths spoces boiler room temperate praefurnium hypocaus hypocoustum heating system caldarium laconicum lepidarium frigidarium ancient antique site archeology architecture art culture destroyed excavations heritage hispanic historic landmark provinces spanish june 2023 one important remains located