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
Diocletian window Diocletian window Diocletian windows, also called thermal windows, are large semicircular windows characteristic of the enormous public baths ("thermae") of Ancient Rome. They have been revived on a limited basis by some classical revivalist architects in more modern times. Diocletian windows are large segmental arched windows (or other openings) which are usually divided into three lights (window compartments) by two vertical mullions. The central compartment is often wider than the two side lights on either side of it. Diocletian windows are named after the windows found in the Thermae (Baths) of Diocletian (AD 302) in Rome. (The Thermae is now