Formerly known as Shah Mosque in Isfahan, Imam Mosque, located on the south side of Naghsh-e Jahan Square, is an extraordinary unique structure of the world. The construction of the mosque started during Shah Abbas I and is considered as a great example of Islamic architecture. Its reputation mainly relates to delicate tile works, stunning architecture, charming dome and unique stone carvings. The main entrance which is located on the west side of the mosque addresses a big square as the central square of Isfahan, and there also is a fountain just at the beginning of the entrance. The arch of the great entrance is lined with colorful Muqarnas. There are two tall minarets on both sides of the entrance, and two-story shops around the main square. Domed side halls on the east side of the mosque are connected to the main courtyard, where there are two Madrasas (school). The double shell dome located in the north part of the mosque and the exterior part are covered with the most beautiful blue and gold tiles. There are also two more minarets on both sides of the dome as tall as 48 meters. There are some entrances which are connected to other parts of the city. Imam Mosque was registered as one of the national heritages in 1931.
