The Stonemasonry of Azadi Square
The stonemasonry of Azadi Square stands as one of the most defining characteristics of this iconic monument. This is evident in the selection, color consistency, and massive scale of the natural stone—where individual elements had to be extracted from raw quarry blocks measuring up to six cubic meters. Most remarkably, it is defined by the complex geometry of the components: thousands of unique, irregular polygonal stone panels crafted with warped, double-curved surfaces. These blocks were meticulously dressed to assemble a fluid, twisting architectural elevation that spirals upward—a complex geometry that would be nearly impossible for a stonemason to interpret from conventional 2D blueprints alone.
Master Ghaffar Davarpanah was the visionary who undertook this monumental task in Iran during the 1960s, executing it with extraordinary ingenuity, professional mastery, adherence to schedule, and cost efficiency. It was he who led the architectural team to the Joshqan marble quarry to evaluate stone properties, block dimensions, and fabrication feasibility. He brought Ghanbar Rahimi—renowned as the "King of Stone in Iran"—into the project, recruited the nation's finest master stonemasons, and devised an optimal site-execution strategy by establishing an on-site stone processing yard directly within the plaza. To achieve this, he imported and installed custom stone-cutting machinery, enabling all final block sawing and dressing to occur on-site upon arrival of raw marble blocks from the quarry.
To enable masons to visualize three-dimensional spatial geometries and accurately carve each warped surface, Davarpanah invented a pioneering template system utilizing full-scale hollow plywood mock-ups derived from computer-generated spatial coordinates. By supplying these 1:1 physical models, he provided a tangible guide for masons to carve each complex block with absolute precision. He managed operations through to the installation of the very last stone slab and enthusiastically championed bespoke stonework challenges—evidenced by the extraordinary solid granite main entrance doors to the museum and the solid marble door at the base of the tower.
The stonemasonry of the Azadi Monument remains a historical masterwork that continues to stand unparalleled globally in terms of stone selection, dimensional scale, carving precision, slab thickness, and innovative structural anchoring—notably using the exterior stone cladding as permanent stay-in-place formwork for the poured reinforced concrete core. Decades after its completion, this stone engineering achievement stands as a brilliant global benchmark, credited to the brilliance of Master Ghaffar Davarpanah, Master Ghanbar Rahimi, and key project engineers Iraj Haghighi and Mohammad Pourfathi—a enduring symbol of Iranian technical ingenuity, craftsmanship, and dedication embodied within Azadi Tower.
