Fire Temple of Isfahan is a historical building and a monument belonging to ancient Iran. The temple is located on a hill, near Zayandeh Rud, to the west of Isfahan. There is also a great view of the surrounding from the temple on the hill. In ancient texts, the temple is called the Marbin or Mehrin Fortress. Excavation of Gourtan (name of the region) potteries and ancient names of some villages in the Marbin area implies on the existence of culture and ancient civilization in the region.

The structure is made of mud-brick layers filled by straw in between, to improve its strength. The large mud-brick columns of the building start from the middle of the hill and convert to strong and reliable columns on top, where there used to be some chambers. There are some remaining parts of orderly stairs carved in the rocks and continued to the above of the hill which is ruined now. On top of the hill, a round chamber is made which can be considered as the final point of the structure. There is no structure on top of the chamber. The chamber entails eight corners and in each corner there is a window facing out. It is cited that the Zoroastrian priest used to keep the holy fire in this chamber. The fire temple used to have rooms and buildings in four directions of the hill which have continued under the fire space. The only parts remained intact are the northern and eastern part of the temple.