Spa

CALIDARIUM

A Calidarium (also called a Caldarium, Cella Caldaria or Cella Coctilium) was a room with a hot plunge bath, used in a Roman bath complex; this was a very hot and steamy room heated. This was the hottest room in the regular sequence of bathing rooms; after the caldarium, bathers would progress to the tepidarium and the frigidarium
In the caldarium there would be a bath (alveus, piscina calida or solium) of hot water sunk into the floor and there was sometimes even a laconicum - a hot, dry area for inducing sweating. The bath's patrons would use olive oil to cleanse themselves by applying it to their bodies and using a glove for a gommage.

TEPIDARIUM

The tepidarium was the warm (tepidus) bathroom of the Roman baths heated by a hypocaust or underfloor heating system. The tepidarium in the Roman thermae was the great central hall round which all the other halls were grouped, and which gave the key to the plans of the thermae. It was probably the hall where the bathers first assembled prior to passing through the various hot baths (Caldaria) or taking the cold bath (Frigidarium).

FRIGIDARIUM

A frigidarium is a large cold pool to drop into after enjoying a hot Roman bath. The Caldarium and the Tepidarium open the pores of the skin. The cold water would close the pores. There would be a small pool of cold water or sometimes a large Swimming pool.