Azadi Square, spanning approximately 150,000 square meters (15 hectares), stands as the largest public plaza in the Middle East. The total built surface area of the complex covers around 78,000 square meters. The central monument is designed as a monumental gateway rising approximately 45 meters high—with 5 meters anchored below ground level—featuring a main vault clearance of 23 meters above the ground and divided into eight distinct structural sections. The base width of the structure extends 66 meters. Within the surrounding plaza, 65,000 square meters are landscaped with manicured gardens and floral displays. The construction utilized 25,000 custom architectural stone blocks and 900 tons of structural steel.
The Azadi Cultural Complex comprises several subterranean functional zones situated directly beneath the main tower, encompassing museums, a library, audio-visual units, exhibition galleries, auditoriums, and concert/conference halls across a 5,000-square-meter footprint that incorporates the main tower supports. The main library occupies approximately 2,715 square meters, complemented by a specialized researchers' and authors' library covering 243 square meters.
Hossein Amanat states: "In this monument, the central lower arch represents the pre-Islamic Taq Kasra from the Sasanian era, while the upper pointed arch reflects the post-Islamic architectural influences of Iran. The intricate ribbing transition (Rasmi-Bandi) filling the space between these two arches is distinctly Iranian, inspired by traditional Iranian mosque domes. The dome-building methodology in Iran is remarkable; every mosque offers a fresh architectural expression. Demonstrating Iranian ingenuity, ancient master builders transitioned from a square structural base into a circular dome ring utilizing elegant Rasmi-Bandi and Muqarnas vaulting. This exact structural transformation is implemented in Azadi Tower: the building's geometry transitions from a rectangular base, rotating over its four main piers to form a 16-sided polygon, ultimately culminating in an interior dome. While invisible from the exterior elevation, this vaulting is fully observable from within the tower."
Technical Specifications and Interior Spatial Layout
The exterior stone cladding at the lower elevation features individual blocks measuring up to 3.2 meters in length and 1.6 meters in height. The stone slabs are anchored to the reinforced concrete core using stainless steel ties, featuring a roughened rear texture to prevent slippage. Furthermore, every joint between adjacent stone slabs is sealed with an elastomeric flexible gasketing compound resembling synthetic rubber to accommodate thermal movement.
The subterranean level of Azadi Square is designed with pedestrian underpasses connecting the perimeter of the plaza directly to the central concourse. The main entrance opens into a sunken courtyard set 5 meters below ground level. Bordering this courtyard, the northern side houses security and ticket offices, the eastern side features the Iranology Hall and the Ancestors' Passage, and the southern side accommodates the VIP Reception Hall. The Iranology Hall is a rectangular space measuring 21×29 meters, where visitors travel along a U-shaped route on a moving walkway suspended above a relief map of Iran, exploring key landmarks corresponding to each geographical region.
The VIP Protocol Hall is a rectangular space measuring 9×17 meters designated for receiving official dignitaries, characterized by intricate architectural bas-reliefs cast directly into the concrete surfaces and decorative ceilings. The Ancestors' Passage is a crypt-like, low-light concrete gallery flanked by four display cases containing precious artifacts dating back to the 1st millennium BCE. This corridor evokes the subterranean passages, vestibules, and crypts of ancient Iranian architecture.
To the south of the ancient hall lies the central mechanical and HVAC plant, while the northern wing houses the Hall of Mirrors. The Hall of Mirrors is a rectangular gallery measuring 10×20 meters featuring six display cases along both its eastern and western walls. At its northern end, a stepped level change leads into a distribution vestibule. Connected to the east is a semi-octagonal corridor (Hashti-style plan) lined with eight display alcoves, providing access to an adjoining rectangular gallery measuring 6×12 meters.
