Radkan Tower, Medieval tower and mausoleum in Radkan District, Iran.
This conical brick structure rises 25 meters high with a 20-meter diameter base, featuring 36 semicircular columns ascending from a dodecagonal foundation to support an elegant dome.
Constructed around 1262 CE during the Mongol invasions, the tower was completed according to inscriptions found on its upper sections and represents advanced medieval Iranian engineering techniques.
The structure embodies the sophisticated astronomical knowledge of 13th-century Persian scholars, particularly associated with Nasir ad-Din al-Tusi and the development of calendar calculation methods in medieval Iran.
Located 26 kilometers northwest of Chenaran city, visitors can access this Iranian National Heritage site to observe its geometric design and learn about medieval astronomical practices firsthand.
The tower functioned as both a mausoleum and astronomical observatory, with its dodecagonal base representing the twelve months and doors aligned to track seasonal changes and solar movements.
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