Archaeologists have discovered a vast Bronze Age metropolis in the Kazakhstan steppe, reshaping the understanding of early urban life and metalworking in prehistoric Eurasia. The international team from University College London, Durham University, and Toraighyrov University has identified the settlement as Semiyarka, a large and highly organized center that stood far earlier—and far more developed—than scholars once believed.
A city rising above seven valleys
The site stretches across 140 hectares on a high promontory above the Irtysh River in northeastern Kazakhstan. Its dramatic perch over seven deep valleys earned it the name “City of Seven Ravines.” Researchers date the settlement to around 1600 BC and say its scale, planning, and complexity challenge long-held assumptions about steppe societies.
Urban layout points to a planned settlement
Semiyarka shows clear signs of urban design. Archaeologists report rectilinear earthworks, enclosed household compounds, and a large central structure that may have served ritual or administrative functions. The settlement’s layout suggests permanent living spaces arranged with intention rather than temporary camps associated with mobile pastoral groups.
Evidence of large-scale metal production
Excavations and geophysical surveys reveal that Semiyarka also functioned as a major metallurgical center. Researchers identified crucibles, slag, and tin bronze objects in what appears to be a dedicated industrial zone.
This material offers the first firm proof that Bronze Age metalworkers in this region produced copper and tin bronze at a large, coordinated scale. Scientists say the discovery overturns the idea that metallurgical work in the steppe was confined to small, isolated workshops.
A strategic hub in ancient metal networks
The city’s strategic location appears central to its influence. Semiyarka overlooks a key route along the Irtysh valley and sits near major copper and tin sources in the Altai Mountains. Archaeologists say this position likely made it an important node in the Bronze Age metal networks that linked Central Asia with wider Eurasian trade systems.
The investigation is led by Dr. Viktor Merz and Dr. Ilya Merz of the Joint Research Center for Archaeological Studies at Toraighyrov University, working with Dr. Miljana Radivojević of the UCL Institute of Archaeology and Professor Dan Lawrence of Durham University.
Their findings, published in Antiquity, draw on advanced archaeological methods to reconstruct the region’s social and technological landscape during the Bronze Age.
Experts say the site transforms understanding of steppe societies
Dr. Radivojević says the discovery marks a major shift in understanding steppe societies. She notes that Semiyarka shows how mobile communities could build permanent, well-structured settlements supported by large-scale metal production.
She adds that the site provides the first clear evidence for tin bronze manufacturing in the region, a technology central to Bronze Age economies across Eurasia.
Semiyarka’s planning mirrors early urban traditions
Professor Lawrence says Semiyarka’s scale and planning stand out in the steppe. He explains that the structured compounds and potential monumental buildings mirror the urban forms seen in other ancient civilizations.
The next stage of excavation brings new possibilities
Dr. Viktor Merz, who has surveyed Semiyarka for years, says collaboration with UCL and Durham has transformed the project. He highlights the new expertise in archaeometallurgy and landscape archaeology that is guiding the next phase of excavation.
A metropolis on the steppe
Rising above the Irtysh valley, Semiyarka now stands as a rare reminder that the grasslands of Central Asia once held a metropolis equal in ambition and technical skill to the great Bronze Age centers of the ancient world.
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