The "caldarium" faced southwest, the "frigidarium" northeast. The walls of the frigidarium rise to 15 m. It was followed by the frigidarium, the tepidarium and caldarium. There was a frigidarium, tepidarium and caldarium, as well as an open-air swimming pool. The columns of the "frigidarium" were made of granite and they weighed close to . The Roman bathhouse consisted of three areas, the caldarium, the tepidarium, and the frigidarium. The "caldarium" had seven pools, the "frigidarium" four, the "tepidarium" two. They included an apodyterium, frigidarium, and several warm rooms (tepidaria, calidaria and laconica). The mosaic was found in the frigidarium part of the ancient bath. A frigidarium is a large cold pool at the Roman baths. The frigidarium was usually located on the northern side of the baths. The frigidarium, however, used to be an open pool of cool water. The word frigidarium originates from the Latin word "frigeo", which means "to be cold".