The Jāmeh Mosque of Zanjān (Persian: مسجد جامع زنجان‎ – Masjid-e-Jāmeh Zanjān) also known as, Seyyed Mosque (Persian: مسجد سید ‎, Masjid-e-Seyyed) and Sultani Mosque, is the grand, congregational mosque (Jāmeh) of Zanjān city, Iran. The mosque is situated in the old part of the city and was constructed in 1826 during the Qajar era. The construction was carried out by Abdullah Mirza Dara who was one of the children of Fat'h ‘Alī Shāh Qājār.