It is a traditional Qajar era laundry house and today it is Zanjan’s Anthropology Museum. Historical building of Rakhtshooy Khaneh (which means washhouse) lies at the historical texture of the Zanjan city and was built around 20th century. This place was used for washing clothes by women living in the city. It was constructed by two brothers, Mashad Akbar and Mashadi Esmail. At the present, this historic building is being used as Zanjan’s anthropological museum.