The Shah Mosque of Tehran in the northern section of the Grand Bazaar, also known as the Soltāni (meaning "royal") Mosque, was built in the early 19th century as one of the several symbols of legitimacy for the new Qajar dynasty. At the time of its completion, the mosque was considered to be the most significant architectural monument in the capital. There are some significant similarities between the Shah Mosque, the Vakil Mosque in Shiraz, and the Royal Mosque in Borujerd. According to the tile inscriptions remained on the south Iwan, the exact time of construction dates back to 1833 to 1845. In 1928, the main entrance on the north part of the mosque was renovated, and two tall minarets were added on the command of Naser-al-Din Shah Qajar. Shah Mosque is a four-Iwan mosque whose main Shabestans are situated on the south side, and its overall architecture, as well as some of its details, were taken from Vakil Mosque in Shiraz.