What is the frigidarium used for in Roman baths?

The frigidarium is indeed the cold room in Roman baths, specifically designed for cold baths. It was an important part of the bathing complex, allowing bathers to cool down after using the warmer areas, such as the caldarium (hot bath) and tepidarium (warm bath). The temperature in the frigidarium was typically maintained at a cool level, providing a refreshing contrast to the heat experienced in other parts of the baths. This practice of alternating between hot and cold baths contributed to the Romans' understanding of hydrotherapy and its health benefits. The presence of pools or basins filled with cold water was a hallmark of the frigidarium, making it a central feature of the bathing experience in ancient Roman culture.