Rudas Bath or Rudas fürdő is a thermal bath in Budapest, Hungary which is claimed to have medicinal properties. It was first built in 1550, during the time of Ottoman rule. To date, it retains many of the key elements of a Turkish bath, exemplified by its Turkish dome and octagonal pool. It is located at Döbrentei tér 9 on the Buda side of Erzsébet Bridge. The bath has six therapy pools and one swimming pool where the temperature is in between 10 and 42 °C (50 and 108 °F). The components of slightly radioactive thermal water includes sulfate, calcium, magnesium, bicarbonate and a significant amount of fluoride ion. A sight-seeing brochure claims the water can help to treat degenerative joint illnesses, chronic and sub-acute joint inflammations, vertebral disk problems, neuralgia and lack of calcium in the bone system.