The public bathhouses are included in buildings as public utilities that have been expanded throughout Islamic realm by arising Islamic religion that cleaning is the preamble for most of its rites. Unfortunately, from the beginning of Islamic period until 8th hegira century (15th AD century) no stable sample of public bathhouses remained in Iran, but many public bathhouses have still remained from Safavid and especially from Qajar era all over Iran. Qazvin is a city where there are a lot of public bathhouses. We may not know any remained bathhouses in this city as sample of pre-Safavid era and except for Ghomak and Moslem bathhouses, we could not find another name in ancient texts before this period. But, the Safavid sources have referred to construction of several bathhouses in this city during this period while those foreign tourists, who visited Qazvin in this period, implied numerous and beautiful public bathhouses in this city. Today, Boloor and Qajar bouthhouses have been resumed from Safavid era while both of them were were repaired and reconstructed and used as museums. Also during Qajar period, a great number of bathhouses were constructed in Qazvin. Adib-Al-Mamalek, a stateman of Qajar period, has mentioned 50 public bathhouses located in Qazvin City out of which 15 samples of them were among well- known baths. Haj Mir Hossein bathhouse is one of those famous bathese he referred to them. This bathhouse is also one of the oldest baths remained from Qajar Dynasty. This bath was repaired and reconstructed during recent years and it has been currently converted and used as museum and art and culture center.