Sultan Amir Ahmad Bathhouse is a 16th-century public bathhouse built during the Safavid era in Kashan, Iran. The bath has a great interior and exterior design. The wise use of elements in the structure of the bath especially the uses of glasses on the roof to lighten the bath is the most unique architectural one. A large octagonal hall with an octagonal pool in the middle of it. This area is called Sarbineh or dressing hall that is decorated with turquoise and gold tiles, plasterwork, and paintings, where people sit and talk for a while before they are getting out.