TEHRAN - The first phase of the restoration of the Sangbar Chahar-Taqi structure in Mashhad, has been successfully completed, marking a significant step in preserving the Timurid-era monument, said a local official.

“The restoration included reinforcing the foundation, repairing the base and arches, as well as refurbishing the roof and decorative brickwork,” Ehsan Zohrehvandi told IRNA on Monday.

The official noted that the Four-Iwan (known as Chahar-Taqi in Persian) structure, which dates back to the Timurid period, was registered as a national monument in 2004.

The architecture of this structure, he added, consists of a square room with four walls, each standing over six meters high. At the top of each corner, there is a circular dome, creating a four-arched gateway structure, according to Zohrehvandi.

The Sangbar Chahar-Taqi, located in the village with the same name in Khorasan-Razavi, is built using brick and stone. Its distinctive brickwork, featuring a zigzag pattern on the exterior, reflects the architectural style of the Timurid era.

Historically, Chahar-Taqi buildings are square structures with four arches and four columns, topped with a short dome and lacking walls. The oldest known Chhar-Taqi structure in Iran is the fire temple of Khajeh mountain from the Parthian period in Sistan-Baluchestan.

XF/AM