Arg of Tabriz also known as Arg-e Alishah is the remains of an Ilkhanid era (1256–1335) structure, which is considered the symbol of the city and one of the tallest historical walls in the country. The complex once included a Ribat, a school and a mosque. An earthquake devastated the complex 300 years ago. During the Constitutional Revolution, the forces of revolutionary leaders Sattar Khan (1866-1914) and Baqer Khan (1870-1911) took cover in the Arg of Tabriz from the cannon fire of Qajar King Mohammad Ali Shah (1972-1924). Today the area around this 700-year-old Arg is used for Friday and other public prayers.