The city contains the great mosque of Kufa , constructed in the middle of the 7th century after the Caliph Omar established the city .
The mosque has been redeveloped in various phases over the years and today it features an elegant gold dome and Saffavid tile work from the 17th and 18th centuries. Twenty-eight semi-circular towers support the exterior wall; it is speculated that they date to the early Islamic period. During excavation, the Iraqi Department of Antiquities learned that although these towers stretched two meters into the ground, they were being stabilized by another set of differently sized towers beneath them, that at one point belonged to an earlier mosque on the site. Furthermore, these excavations provided evidence that the qibla side of the mosque is structurally connected to the west wall of the Dar al-Imara.