Frigidarium

[1] The succession of bathing activities in the thermae is not known with certainty, but it is thought that the bather would first go through the apodyterium, where he would undress and store his clothes, and then enter the elaeothesium or unctuarium to be anointed with oil.

[2][dubious – discuss][better source needed] Italy initially had simple baths without tubs, the lavatrinae.

[3] Eventually, individual standing hot water tubs were replaced by collective pools and the development of hypocaust heating.

[3] This led to various types of heated rooms, including the caldarium, tepidarium, laconicum or sudatorium, and the frigidarium.

[3] There are examples from Hasmonean and Herodian palaces in Judaea (e.g. Jericho, Herodium), where Jewish ritual immersion pools or mikva'ot were located in the frigidaria of the private royal bathing facilities.