The Jāmeh Mosque of Isfahān is the grand, congregational mosque (Jāmeh) of Isfahān city, within Isfahān Province, Iran. The mosque is the result of continual construction, reconstruction, additions and renovations on the site from around 771 to the end of the 20th century. The Grand Bazaar of Isfahan can be found towards the southeast wing of the mosque.
This is one of the oldest mosques still standing in Iran, and it was built in the four-iwan architectural style, placing four gates face to face. An iwan is a vaulted open room. The qibla iwan on the southern side of the mosque was vaulted with muqarnas during the thirteen hundreds. Muqarnas are niche-like cells.