The Seyit Mosque of Zanjān (in Azeri: Seyit Machidi, in Persian: Masjed-e-Seyyed) aka jaame mosque, is the grand, congregational mosque of Zanjān city, Iran. The mosque is situated in the old part of the city and was constructed in 1826 during the Qajar period. The construction was carried out by Abdullah Mirza Dara who was one of the children of Fath Ali Shah Qajar, the second king of Qajars. The mosque contains four porticos on the sides of a large open court. To the east and west of the court sixteen chambers exist running parallel to each other. Facing towards south are more chambers used as residential quarters for theology students. These chambers have vaulted and arched ceilings decorated with artistic tile work. The mosque has a great turquoise dome that ayahs of Sura Ad-Dahr (76th sura of Holy Koran), have been written on it.