An elaborately dressed woman pampers a man in a vapor-bath. The origins of the steam bath come from the Roman bath, which began during the height of the Roman Empire. Ancient Roman baths served many community and social functions within Roman society. Everyone in Rome used Roman public baths, regardless of socioeconomic status. These Roman baths were supplied by natural hot springs from beneath the ground. Balneology is the branch of medical science concerned with the therapeutic value of baths, especially those taken with natural mineral waters. Balneotherapy may involve hot or cold water, massage through moving water, relaxation or stimulation. Many mineral waters at spas are rich in particular minerals (silica, sulfur, selenium, radium) which can be absorbed through the skin. Wolfenbutterar Sachsenspiegel, 14th century manuscript.