Sultan Amir Ahmad Bathhouse, also known as the Qasemi Bathhouse, is a traditional Iranian public bathhouse in Kashan. It was constructed in the 16th century, during the Safavid era; however, the bathhouse was damaged in 1778 as a result of an earthquake and was renovated during the Qajar era. The bathhouse includes a changing room (sarbineh) with a small octagonal pool (Howz) in the center. The changing room (sarbineh) of Sultan Amir Ahmad Bathhouse is famous for its intricate stucco and limestone reliefs as well as its colorful tile work .
There are elevated platforms covered in Kashan rugs all around the changing room where customers once sat to rest. The bathhouse has a unique roof with multiple domes. The concave glass used to decorate each dome brought daylight into the bathhouse and prevented onlookers from seeing inside. The roof of the bathhouse is made of multiple domes that contain convex glasses to provide sufficient lighting to the Bathhouse while concealing it from the outside. In the past the Bathhouse has been used as a traditional teahouse; nevertheless, today it serves as an Anthropological Museum.