What is the primary function of a frigidarium?

The primary function of a frigidarium in ancient Roman baths is indeed to cool off after a hot bath. It typically served as a cold room where bathers could refresh themselves after experiencing the heating process in the caldarium, or hot bath. The frigidarium was designed to contain cold water pools, which provided a shocking contrast to the intense heat that bathers had just endured, helping to close the pores of the skin and invigorate the body after the heat exposure. This transition from hot to cold was an important aspect of Roman bathing culture, emphasizing not only hygiene but also the therapeutic benefits of alternating temperatures.