Jāmeh Mosque Of Varāmīn, Congregation Mosque Of Varamin, is the grand, congregational mosque (Jāmeh) of Varamin city, within the Tehran Province . This mosque is one of the oldest buildings of Varamin city.
Its construction began during the reign of’ Sultan Mohammad Khodabaneh and was completed during his son’s rule Sultan Abu Sa'eed. This building consists of a Shabestan, portico, large brick dome, the structure beside shabestan and ten small arches along with one large arch in the middle.
Reference:
http://en.wikipedia.org