Situated in the center of the city of Isfahan, the Juma Mosque is the most significant Seljuk monument in the city. Isfahan became the capital of the Seljuks, who came to Iran in the 11 th century. Adopting Sunni Islam, the Seljuks considered it an honour to repair the mosque, which was built by the Abbasid caliph. After the conquest of the city by Tughrul Beg, the Seljuks began an intense construction activity, and the Isfahan Masjidi Juma is the leading example of these efforts. The Seljuks did not conceive of the Masjidi Juma as an independent structure, but rather as an integral part of the urban plan. The Seljuks thus initiated the concept of the urban square, which would be further developed during the Safavid period. information from sources of the period relate the initial state of the building. Yakut Halevi states that when Tughril Beg conquered the city in 1051, the citizens of Isfahan forced him to destroy the building because of their need for wood Nasır; Husrev, who saw the mosque in 1052, describes its magnificent appearance. According to these sources, ft can be determined that the mosque was built in the Arabic or Kufa-type hypostyle mosque plan, as there were numerous wood bearing supports in place prior to the Seljuk period. http://www.selcuklumirasi.com/architecture-detail/juma-mosque