Temple of fire Chahār Qāpi
Chahār Qāpi is located in the city of Qasr-e Shirin (Kermānshāh region). This building chahār tāghi (square-shaped room covered by a dome and with four entrances) dates back to the Sassanid period, at the time of Khosrow Parviz and various functions are mentioned such as: fire temple, hearth and astronomical use.
The temple of fire Chahār Qāpi whose name means "four doors", is one of the historical and surprising buildings that probably, in conjunction with the influence of the Ottomans in this area, was called "chahār qāpi-qāpu which in Turkish has the meaning of door ".
This building with four entrances comprises a square room measuring 25 × 25 meters which had a dome-shaped roof with a diameter of 16 meters of which no trace remains today, while only the remains of the gushvareh on its four sides.
Around this building there is a complex of rooms and spaces whose parts have been identified in the outcome of archaeological research in recent years. The building materials of this historic monument consisted of debris and plaster mortar and its dome was brick.
The temple of fire Chahār Qāpi was among the "calendar" buildings of Iran that was used to distinguish the beginning of the seasons of the year and in the fourth and fifth centuries of the lunar Hegira also by cattle breeders and traders as a temporary residence .
The first European explorer who spoke about it was Pietro della Valle who in the year 1659 visited the ruins of Qasr-e Shirin.
This historical monument, which during the war imposed by Iraq against Iran and due to the strong earthquake of Sar-e Pol-e Zahāb in the month of Ābān of the year 1396 suffered serious damage, is considered among the tourist attractions of the area.