World Heritage Identification Number: 113
World Heritage since: 1979
Category: Cultural Heritage
WHE Type: Archaeological Sites
Transboundary Heritage: No
Endangered Heritage: No
Country: 🇮🇷 Iran (Islamic Republic of)
Continent: Asia
UNESCO World Region: Asia and the Pacific
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Chogha Zanbil: An Unfinished Ziggurat in Ancient Elam
Chogha Zanbil, also known as Al Untas Napirisa or Dur Untash, is an exceptional archaeological site located in the Khuzestan province of Iran. This ancient Elamite complex, dating back to the 14th or 13th century BC, is one of the few existing ziggurats outside Mesopotamia and is recognized as a UNESCO World Heritage Site since 1979.
More to come…UNESCO Description of the World Heritage Site
The ruins of the holy city of the Kingdom of Elam, surrounded by three huge concentric walls, are found at Tchogha Zanbil. Founded c. 1250 B.C., the city remained unfinished after it was invaded by Ashurbanipal, as shown by the thousands of unused bricks left at the site.
UNESCO Justification of the World Heritage Site
Criterion (iii): The ruins of Susa and of Tchogha Zanbil are the sole testimonies to the architectural development of the middle Elamite period (1400-1100 BCE).
Criterion (iv): The ziggurat at Tchogha Zanbil remains to this day the best preserved monument of this type and the largest outside of Mesopotamia.
Encyclopedia Record: Chogha Zanbil
Chogha Zanbil, Elamite: Al Untas Napirisa, later Dur Untash, is an ancient Elamite complex in the Khuzestan province of Iran. It is one of the few existing ziggurats outside Mesopotamia. It lies approximately 30 km (19 mi) southeast of Susa and 80 km (50 mi) north of Ahvaz. The construction date of the city is unclear due to uncertainty in the chronology of the reign of Untash-Napirisha, but is clearly sometime in the 14th or 13th century BC. The conventionally assumed date is 1250 BC. The city is currently believed to have been destroyed by the Neo-Assyrian ruler Assurbanipal in about 645 BC, along with the Elamite capital of Susa, though some researchers place the end of occupation in the late 12th century BC. The ziggurat is considered to be the best preserved example of the stepped pyramidal monument by UNESCO. In 1979, Chogha Zanbil became the first Iranian site to be inscribed on the UNESCO World Heritage List.Additional Site Details
Area: Not available
Number of Components: 1
(iv) — Outstanding example of a type of building or landscape
Coordinates: 32.00857 , 48.522118
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© Unknown, CC BY-SA 3.0 Resized from original. (This derivative is under the same CC BY-SA license.)
World Heritage Research
Discover scientific research and academic studies that deepen our understanding of Tchogha Zanbil from its history and significance to its conservation, management, and contemporary challenges.
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From drought to deluge: the complex impacts of climate change on earthen heritage
Climate change poses severe and multifaceted threats to earthen heritage sites, including erosion, structural deterioration, and cultural value loss. A systematic study of four vulnerable regions—Sistan, Yazd, Persepolis, and Tchogha Zanbil—reveals that shifting precipitation patterns, extreme weather events, rising temperatures, and water scarcity exacerbate these risks. Socioeconomic factors like limited conservation resources further compound vulnerabilities. The research introduces an interdisciplinary framework to assess vulnerability, integrating physical, social, and cultural dimensions, and emphasizes the need for adaptive strategies, effective governance, and community engagement to mitigate impacts. This approach offers a novel method for evaluating climate change risks in earthen heritage, providing actionable insights for preservation efforts.
Nakhaei Ashtari, M., Della Ventura, G., & Correia, M. (2025). From drought to deluge: the complex impacts of climate change on earthen heritage. Journal of Cultural Heritage Management and Sustainable Development. https://doi.org/10.1108/jchmsd-05-2024-0116
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Architectural and astronomical heritage of Iran: a study of Chogha Zanbil and Radkan Tower
Chogha Zanbil Ziggurat and Radkan Tower represent pivotal advancements in ancient Iranian astronomical engineering, transitioning from rudimentary shadow-based solar observations to sophisticated calendrical tools. Chogha Zanbil (circa 1250 BC) served as a ceremonial center with observational capabilities, while Radkan Tower (660 AH/1262 AD), designed by Khwaja Nasir al-Din al-Tusi, achieved precise cardinal and Vernal Equinox alignment. Comparative analysis reveals their dual roles in cultural heritage and scientific innovation, underscoring their significance for Sustainable Development Goal 11 (Sustainable Cities and Communities). The study highlights the integration of celestial knowledge into architecture, advocating for the preservation of such sites as critical components of global astronomical and engineering history.
Amiri, N. A., Majd, A. N., Janpourtaher, M., & Barkeshli, M. (2025). Architectural and astronomical heritage of Iran: a study of Chogha Zanbil and Radkan Tower. Journal of Umm Al-Qura University for Engineering and Architecture, 16(4), 937–951. https://doi.org/10.1007/s43995-025-00126-z
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Ecological restoration of historical monuments (With a Focus on the Restoration of Chogha Zanbil)
Ecological restoration emerges as a viable and effective method for preserving the historical-cultural authenticity of ancient monuments, as demonstrated by its application at Tchogha Zanbil. This UNESCO World Heritage Site, renowned for its unique earthen ziggurat structure, serves as a case study showcasing how ecological restoration can maintain architectural integrity while fostering cultural connections between past and present. The research employs a descriptive-analytical approach combined with field observations to evaluate the potential of this method in safeguarding historical structures. Findings highlight that ecological restoration not only preserves the religious and cultural significance of Tchogha Zanbil but also strengthens the relationship between its architectural space and surrounding environmental elements, offering a sustainable model for heritage conservation.
Roya Nazari Najafabadi, Sana Avar, Mohammad Karimi, Mahsa Anbari, & Sajjad Naseri. (2024). Ecological restoration of historical monuments (With a Focus on the Restoration of Chogha Zanbil). World Journal of Advanced Research and Reviews, 23(2), 240–250. https://doi.org/10.30574/wjarr.2024.23.2.2303
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Gift Recipients and Royal In-Laws
A key insight from this study is that diplomatic marriages between kings and allies' daughters, along with the granting of land to loyal officials, played significant roles in maintaining political stability during the Late Bronze Age (1550–1200 BCE). The research examines how Burna-Buriash II of Babylon leveraged these strategies, including marrying his daughters to prominent figures such as the pharaoh Akhenaten and the Hittite king Suppiluliuma I. It also explores the consequences of these alliances, such as Tawananna's conflict with Suppiluliuma I's son, and the legacy of Burna-Buriash II's marriage to an Assyrian princess, whose son was later overthrown. The study uses historical records, including sealed contracts like Abi-hunni’s, to trace the impact of these diplomatic ties on Near Eastern kingdoms.
Podany, A. H. (2022). Gift Recipients and Royal In-Laws. Weavers, Scribes, and Kings, 369–392. https://doi.org/10.1093/oso/9780190059040.003.0015
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Petrochemical attributes of glazed architectural elements from Middle-Elamite to Achaemenid excavation sites in Iran
A groundbreaking analysis of glazed architectural elements from Middle-Elamite to Achaemenid sites in Iran reveals the use of regionally specific halophyte species for soda production, a key component in ancient glassmaking. The study, which includes samples from Qalaichi, Rabat, Hasanlu, Ziwiye, Chogha Zanbil, Susa, and Persepolis, identifies sodium-antimonate as a distinct white colourant and opacifier in certain glazes. Using advanced techniques such as petrographic microscopy, back-scattered electron imaging, and electron probe microanalysis, researchers characterized the microstructure and alteration phenomena of these glazes, providing unprecedented insights into ancient production chains. The findings highlight regionally and temporally contrasting alteration processes, offering a deeper understanding of the evolution of glazed decoration in Iran.
Raith, M. M., Abdali, N., & Yule, P. A. (2022). Petrochemical attributes of glazed architectural elements from Middle-Elamite to Achaemenid excavation sites in Iran. Archaeological and Anthropological Sciences, 14(9). https://doi.org/10.1007/s12520-022-01648-6
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Technological and Archaeological studies of the Middle-Elamite and Neo-Elamite colord glazed ceramics (1500-540 BCE)
A groundbreaking study challenges the long-held belief that Tchogha Zanbil (1250 BCE) holds the earliest known ceramic glazes, instead tracing their origins to Haft Tepe (1500 BCE). Using advanced analyses like XRD, EPMA, and petrography, researchers determined that Neo-Elamite ceramics exhibited greater compositional diversity than Middle-Elamite ones, suggesting varied firing conditions. Additionally, while no nanoparticles were found in Middle-Elamite glazes, they were identified in Neo-Elamite samples from Jubaji and Qalaichi, likely linked to firing atmospheres. The study also revealed that Elamites described colors using known materials rather than specialized terminology, providing new insights into ancient ceramic production techniques.
Aarab, A. Technological and Archaeological studies of the Middle-Elamite and Neo-Elamite colord glazed ceramics (1500-540 BCE). https://doi.org/10.70675/17488a36z4a7dz40f0za636z30389b5469c3
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Assessment of vulnerability and site adaptive capacity to the risk of climate change: the case of Tchogha Zanbil World Heritage earthen site in Iran
Tchogha Zanbil, a UNESCO World Heritage earthen site in Iran, faces significant vulnerability to climate change due to its exposure to extreme climatic events. A novel framework was developed to assess this vulnerability and the potential adaptive capacity of traditional knowledge and ancient systems at such sites. The study found that while Tchogha Zanbil is highly susceptible to adverse effects from climate variability and temperature extremes, there exists a capacity for adaptation rooted in historical practices. This research contributes to global efforts in climate change adaptation planning for cultural heritage, particularly for earthen sites in regions with rising climate risks. Limitations included restricted data access due to COVID-19, but the methodology remains valuable for similar studies.
Nakhaei Ashtari, M., & Correia, M. (2021). Assessment of vulnerability and site adaptive capacity to the risk of climate change: the case of Tchogha Zanbil World Heritage earthen site in Iran. Journal of Cultural Heritage Management and Sustainable Development, 12(2), 107–125. https://doi.org/10.1108/jchmsd-06-2021-0108
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