Soltaniyeh


World Heritage Identification Number: 1188

World Heritage since: 2005

Category: Cultural Heritage

Transboundary Heritage: No

Endangered Heritage: No

Country: 🇮🇷 Iran (Islamic Republic of)

Continent: Asia

UNESCO World Region: Asia and the Pacific

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Soltaniyeh: A Glimpse into the Grandeur of Persian Architecture

Soltaniyeh, located in the Central District of Soltaniyeh County, Zanjan Province, Iran, serves as the administrative center for both the county and the district. However, it is not just a city; it is a testament to the grandeur and artistic prowess of Persian architecture that has left an indelible mark on the annals of history. Inscribed as a UNESCO World Heritage Site in 2005, Soltaniyeh stands as one of the most significant examples of Islamic architecture and a pivotal milestone in the evolution of Persian architecture.

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UNESCO Description of the World Heritage Site

The mausoleum of Oljaytu was constructed in 1302–12 in the city of Soltaniyeh, the capital of the Ilkhanid dynasty, which was founded by the Mongols. Situated in the province of Zanjan, Soltaniyeh is one of the outstanding examples of the achievements of Persian architecture and a key monument in the development of its Islamic architecture. The octagonal building is crowned with a 50 m tall dome covered in turquoise-blue faience and surrounded by eight slender minarets. It is the earliest existing example of the double-shelled dome in Iran. The mausoleum’s interior decoration is also outstanding and scholars such as A.U. Pope have described the building as ‘anticipating the Taj Mahal’.

UNESCO Justification of the World Heritage Site

Criterion (ii): The Mausoleum of Oljaytu forms an essential link in the development of the Islamic architecture in central and western Asia, from the classical Seljuk phase into the Timurid period. This is particularly relevant to the double-shell structure and the elaborate use of materials and themes in the decoration.

Criterion (iii): Soltaniyeh as the ancient capital of the Ilkhanid dynasty represents an exceptional testimony to the history of the 13th and 14th centuries.

Criterion (iv): The Mausoleum of Oljaytu represents an outstanding achievement in the development of Persian architecture particularly in the Ilkhanid period, characterized by its innovative engineering structure, spatial proportions, architectural forms and the decorative patterns and techniques.

Encyclopedia Record: Soltaniyeh

Soltaniyeh is a city in the Central District of Soltaniyeh County, Zanjan province, Iran, serving as capital of both the county and the district.

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Additional Site Details

Area: 790.146 hectares

UNESCO Criteria: (ii) — Significant interchange of human values
(iii) — Unique or exceptional testimony to a cultural tradition
(iv) — Outstanding example of a type of building or landscape

Coordinates: 36.43528 , 48.79667

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Nearby World Heritage Sites

Takht-e Soleyman
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Trans-Iranian Railway
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Golestan Palace
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Country Information: Iran (Islamic Republic of)

Flag of Iran (Islamic Republic of)

Official Name: Islamic Republic of Iran

Capital: Tehran

Continent: Asia

Population (2024): 91,567,738

Population (2023): 90,608,707

Population (2022): 89,524,246

Land Area: 1,622,500 sq km

Currency: Iranian rial (IRR)

Country Data Sources

Last updated: January 18, 2026

Portions of the page Soltaniyeh are based on data from UNESCO — World Heritage List Dataset and on text from the Wikipedia article Soltaniyeh, licensed under CC BY-SA 4.0. Changes made. Additional original content by World Heritage Explorer (WHE), licensed under CC BY-SA 4.0. WHE is not affiliated with UNESCO or the World Heritage Committee. Legal Notice. Privacy Policy.

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