Gunbad-e-Qabus (gŏnbädˈ-ĕ-kôbŏˈ) [key] or Gonbad-e Kavus gōnbädˈ-ĕ kôvōsˈ, city (1991 pop. 102,768), Mazandaran prov., N Iran, on the Gorgan River. It is an agricultural trade center. The 236-ft-tall (72-m) decagonal brick tower there was built in A.D. 1006, reputedly as the tomb of the amir of S Caspian region of Tabaristan.
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