The Chahar Fasl (Four Season) museum is known as the largest bathhouse in Iran. The activity of Chahar Fasl Museum The 4 Fasl bathhouse is one of the historical monuments of Arak city and belongs to the late Qajar dynasty. This building was built by Haj Mohammad Ibrahim Khansari during the reign of Ahmad Shah Qajar, the last king of the Qajar dynasty. The existence...