Chogha Zanbil

Lore & Background

Chogha Zanbil, typically translated as 'basket mound,' was built about 1250 BC by the Elamite king Untash-Napirisha, mainly to honor the great god Inshushinak. Its original name was Dur Untash, meaning 'town of Untash,' but it is unlikely that many people, besides priests and servants, ever lived there. The complex is protected by three concentric walls; the outer wall had seven gates (only two found), the middle wall had four gates, and between them was a shared temple dedicated to the chief Elamite god Napirisha and to Inshushinak. Most of the innermost 2.5 ha area is taken up by a great ziggurat built over an earlier square temple with storage rooms.

The middle area holds eleven temples for other gods, including Nabu, Adad, Shala, Inanna, Ninegal, Humban, Shimut, Pinikir, Manzat, and Nuska. Sanctuaries northeast of the ziggurat were dedicated to Isniqarab (Ishmekarab) and Kiririsha. Brick inscriptions referring to twenty-two temples have been found, but only about half have been located. In the outer area are royal palaces and a funerary palace containing five subterranean royal tombs. Construction continued after Untash-Napirisha's death until the site was destroyed by the Assyrian king Ashurbanipal in about 645 BC. Some scholars speculate that Untash-Napirisha attempted to create a new religious center to unite the gods of highland and lowland Elam.

The ziggurat originally measured 105.2 meters on each side and about 53 meters in height, in five levels, crowned with a temple. Mud brick was the basic material, faced with baked bricks, many with cuneiform inscriptions. It now stands only 24.75 meters high, less than half its original height, but its preservation is unsurpassed.

Reader's Guide

Chogha Zanbil is significant as one of the few surviving ziggurats outside Mesopotamia and as the first Iranian site on the UNESCO World Heritage List. Its construction date is uncertain, but it is conventionally placed at 1250 BC. The site was destroyed by the Neo-Assyrian ruler Assurbanipal around 645 BC, though some researchers suggest occupation ended in the late 12th century BC. The ziggurat is considered the best preserved example of a stepped pyramidal monument. Excavations by Roman Ghirshman between 1951 and 1962 uncovered a walled sacred area with temples, courtyards, and the five-stage ziggurat. Five royal tombs were found, one containing an undisturbed adult female with grave goods. Over 5,000 inscribed bricks were recovered, most in Elamite, with 67 in Akkadian. The site faces threats from petroleum exploration, with seismic tests and digging occurring as close as 300 meters from the ziggurat. Its legacy lies in its unique preservation and its role in understanding Elamite religion and architecture.

Did You Know?

• Chogha Zanbil is one of the few existing ziggurats outside Mesopotamia.
• The ziggurat originally stood about 53 meters high in five levels, but now stands only 24.75 meters.
• Over 5,000 inscribed bricks were found at the site, most in Elamite and 67 in Akkadian.
• The site was discovered by a geologist doing oil exploration who found an inscribed brick.

A Sacred City Forged for the Gods

Chogha Zanbil, whose name translates roughly to 'basket mound,' was conceived around 1250 BC as a purely religious undertaking. King Untash-Napirisha of Anshan and Susa raised the complex primarily to honor Inshushinak, the great deity of the region. Its original name, Dur Untash, simply meant 'town of Untash,' yet it is doubtful that ordinary citizens ever settled there; the population likely consisted almost entirely of priests and their servants. The site is organized around three concentric walls. The outermost ring, which once featured seven gates (only two have been identified), enclosed a shared temple dedicated to both Napirisha and Inshushinak. The middle zone housed eleven temples devoted to deities such as Nabu, Adad, Inanna, and Nuska, along with sanctuaries for Isniqarab and Kiririsha. Inscriptions reference twenty-two temples in total, though roughly half remain unlocated. The innermost quarter, spanning about 2.5 hectares, is dominated almost entirely by the great ziggurat itself, which was raised atop an earlier square temple with storage chambers. Scholars have suggested that Untash-Napirisha may have intended the complex to serve as a new unifying religious center, gathering the gods of both highland and lowland Elam under one roof.

Engineering a Monument to the Sky

The ziggurat at Chogha Zanbil is a masterwork of stepped-pyramid architecture. Originally measuring 105.2 metres on each side and rising approximately 53 metres in five distinct levels, it was crowned by a temple at its summit. Mud brick formed the structural core of the entire complex, while a facing of baked bricks gave the exterior its finished appearance. Many of these baked bricks bear cuneiform inscriptions naming deities in both Elamite and Akkadian. Excavation revealed that construction proceeded in two phases: the first two levels were built along with two temples, and only later was the structure extended to its full five-level height. Every eleventh course of bricks carried an inscription. Four large gates pierced the sides, three of which led by stairways to the second level, while the southwest gate provided access all the way to the fifth and highest terrace. At each gate stood half life-sized statues, including one of blue-glazed terracotta dedicated to Inshushinak. Though the structure now stands at only 24.75 metres—barely half its original height—UNESCO regards it as the best-preserved example of a stepped pyramidal monument in the world.

Unearthing the Sacred City

The story of Chogha Zanbil's modern rediscovery begins with an unlikely source: a geologist conducting oil exploration in the Khuzestan province stumbled upon an inscribed brick. Recognizing its significance, the amateur archaeologist carried it to the team already working at nearby Susa. The inscription described the construction of a sacred city by a ruler called Untash-Gal. Roland de Mecquenem carried out initial surveys and excavations in 1935–39 and again in 1946. The major campaign, however, was led by Roman Ghirshman with the French Archaeological Mission across six seasons between 1951 and 1962. Over 21 months of work, a crew of 100 to 125 laborers removed roughly 76,000 cubic metres of accumulated debris, exposing a 120-square-metre walled sacred precinct. Among the finds were five subterranean tombs; the most remarkable, Tomb IV, remained completely undisturbed and contained the remains of an adult woman aged between 40 and 60, accompanied by grave goods. In total, 5,257 inscribed bricks were recovered, most in Elamite with 67 in Akkadian. More recently, Behzad Mofidi Nasrabadi returned to the site in 1999, 2002, 2004, and 2005, conducting a 35-hectare magnetometer survey in collaboration with the University of Kiel.

Enduring Legacy and Modern Perils

Chogha Zanbil occupies a singular place in the archaeological record as one of the very few ziggurats surviving outside the heartland of Mesopotamia. Situated roughly 30 kilometres southeast of ancient Susa and 80 kilometres north of modern Ahvaz, the complex endured for centuries after its founding. Construction and occupation continued well beyond Untash-Napirisha's lifetime, with numerous building phases extending the site's commercial and residential areas. The city's final destruction is generally attributed to the Neo-Assyrian king Assurbanipal around 645 BC, though some researchers argue occupation ended as early as the late twelfth century BC. In 1979, Chogha Zanbil achieved a landmark distinction: it became the first Iranian site ever inscribed on the UNESCO World Heritage List, recognized as the finest surviving example of a stepped pyramidal monument. Yet that very legacy now faces a modern threat. Rising global demand for petroleum has brought seismic testing and oil-drilling operations dangerously close to the site, with excavation work conducted as near as 300 metres from the ziggurat's foundations. The tension between industrial development and the preservation of this irreplaceable ancient monument remains an urgent and unresolved challenge.

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