The Four-Season Bathhouse () in the Iranian city Arak dates back to the late Qajar era, and had two separate sections for ladies and gents. The tile-work of the clock room and spinal designed columns of this area, including the layout of the bath are interesting features. The structure was renovated into a museum after undergoing necessary repairs.
The Four Seasons Bathhouse in Arak was the largest bathhouse in Iran. This bathhouse was built during the reign of Ahmad Shah Qajar by Haji Muhammad Ibrahim khansari. A variety of decorated tiles in the building display designs of humans, animals, and plants. Drawings and paintings depicting the four seasons of the year in the four corners of the bathhouse are the reason for its name. It is the only bathhouse where a separate part is devoted to religious minorities. Four Seasons Bathroom is recorded in the National Heritage List.