Jame Mosque of Fahraj dates back to Early Islam and is located in Fahraj Village of Yazd. This mosque is also known as Imam Hassan Mosque. Its construction dates back to first half of 1st century AH. This is the only mosque in the Islamic world the building of which has not changed from the beginning. The mosque is a shabistan type without any porch. Although, there is disagreement among archaeologists, apparently Jame Mosque of Fahraj is the oldest mosque in Iran. Although, some believe that Tarikhaneh Mosque of Damghan is the oldest one. Currently, Tarikhaneh Mosque of Damghan is only used as a tourist attraction, but Jame Mosque of Fahraj is still active and people say their prayers there. Eight huge columns, small bedchamber and the general form of the building remind us of buildings in Sasanid Period. A not very high mud minaret of the mosque that is the access point to the roof as well was added to the building in the 3rd century. Like most jame mosques, this mosque has numerous entrances. You can find no signs of altar, dome, inscriptions, tiling or other crafts that later were used in the construction of mosques. This mosque has been registered as a national monument of Iran.