Thermae would be heated by a log fire before being channelled into the hot bathing rooms. The design of baths is discussed by Vitruvius in "De Architectura". "Thermae, balneae, balineae, balneum" and "balineum" may all be translated as "bath" or "baths", though Latin sources distinguish among these terms. "Balneum" or "balineum", derived from the Greek signifies, in its primary sense, a bath or bathing-vessel, such as most persons of any consequence among the Romans possessed in their own houses, and hence the chamber which contained the bath, which is also the proper translation of the word "balnearium". The diminutive "balneolum" is
Clunia of the Roman thermae, of great dimensions and covered in mosaics somewhat simpler than that of the homes of the forum. Here also is very visible the system of heating of the different thermae rooms, the hypocaust. In the subsoil of the city, where no visiting is allowed due to its fragility, are the very interesting systems of water supply and a priapic sanctuary. Clunia Clunia (full name "Colonia Clunia Sulpicia") was an ancient Roman city. Its remains are located on Alto de Castro, at more than 1000 metres above sea level, between the villages of Peñalba de Castro and