- Location : Golestan, 37°15'28.9"N55°10'8.4"E
- Criteria : Cultural: (i)(ii)(iii)(iv)
- Year : 2012
- Description : The 53 m high tomb built in ad 1006.It was the longest minaret at the time of construction.
Gonbad-e Qabus tower is a monument in Gonbad-e Qabus Iran, and an UNESCO World Heritage Site since 2012. The Tower in the central part of the city reaches 72 meters including the height of the platform. The baked-brick-built tower is an enormous decagon building with a conic roof which forms the golden ratio Phi that equals 1.618. The interiors contain the earliest examples of Muqarnas decorative styles. The decagon with its 3 meter-thick wall divided into 10 sides has a diameter of 17 m. The Tower was built on such a scientific and architectural design that at the front of the Tower at an external circle one can hear one's echo.The tower was built in 1006 AD on the orders of the Ziyarid Amir Shams ol-Maali Qabus ibn Wushmgir it is located 3 km north of the ancient city of Jorjan from where the Ziyarid dynasty ruled. The tower is over 1000 years old. A Kufic inscription at the bottom of the tower reads in Arabic: "This tall palace for the prince Shams ul-Ma'ali, Amir Qabus ibn Wushmgir ordered to build during his life in the year 397 the Lunar Hegira and the year 375 the solar Hegira"
Even though the inscription does not explicitly refer to the rumor that the tower was built for the tomb for the prince Ziyarid ruler it is believed that the Sultan's body was put in a glass coffin and was suspended from the ceiling of the tower. It has been registered a World Heritage Site in the tower's upcoming 1,000th anniversary. Gonbad-e Qabus or Gonbad-e Kavus is a city in the province of Golestan in Iran. The city tower was built with bricks representing a special art related to the 4th century (Hegira or 11th century ). This tower which stands on a domed hill with 15 m height is located in the central (principal) park of Gonbad Kavoos city. Robert Byron, the British travel writer and architectural critic wrote that it was a photograph of the tower that motivated him to visit Persia. Seeing the tower he maintained his high opinion of its qualities writing in The Road to Oxiana that 'the Gumbad-i-Kambus ranks with the great buildings of the world.