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

This mosque is another masterpiece of architecture and tilework of the 16th century which was constructed by a decree issued by Shah Abbas I and took a period of 18 years to be completed. The architect and mason of this structure was Ostad Mohammad Reza Isfahani. Inside tile work decorations of the plinth to the top are covered with mosaic tiles. In terms of the architectural grandeur of the mosque, foreign archaeologists believe: “It can hardly be considered a product of human hands.” Sheikh Lotfollah was one of the great pious in the Shia sect, in what is known as Lebanon today. At the invitation of Shah Abbas I, he came to reside in Isfahan. This place was constructed in honour of this great man who led the prayers and preached in this mosque. http://taban.aero/en/tourist-attractions/iran/esfehan.html