| Arg of Tabriz | |
|---|---|
ارگ تبريز | |
| Near Tabriz in Iran | |
 Arg of Tabriz, 2022 | |
  Arg of Tabriz | |
| Coordinates | 38°4′20.5″N 46°17′19.7″E / 38.072361°N 46.288806°E |
| Type | Mausoleum, citadel, and barrack |
| Site history | |
| Built | 1318 AD |
 | |
Arg of Tabriz (Persian: ارگ تبريز, also known as Arg Alishah, Arg-e Alishah, Arch of Alishah, Arg Citadel, and Masjid Ali-Shāh), is the remnants of a large acropolis fortification (whence the metathetic name ark or arg plus polis) and city wall in downtown Tabriz, Iran. Its structure is visible from far distances in downtown Tabriz, if not blocked by the newly erected highrise buildings.
The structure was initially a compound, containing a great vaulted mosque, adjoining prayer halls and libraries, a vast courtyard containing a huge reflecting pool, and a mausoleum—all surrounded by a containing wall. It was built in 14th century during the Ilkhanate era. The point of pride for the building was that its vaulted ayvan was larger than the famous historic vault of Khosrow/Kisra, the Taq Kisra at Ctesiphon/Mada'in. However, with the sudden death of the governor of the city and with some construction complications in constructing a roofed building without pillar for such a huge complex, the mausoleum structure remained incomplete. In the 19th century with the rise of tensions between Iran and Russia the structure rapidly turned into the city's fort and additional military installations such as a barracks and cannon foundry were added to the original structure. During the twentieth century the military installations were removed from original construction and the surrounding of the ark turned into a park. In the late twentieth century a big mosque was built next to the citadel.