A newly discovered Neolithic sanctuary near Chleby in Central Bohemia, Czechia, is reshaping our understanding of prehistoric astronomy, predating Britain’s Stonehenge by more than 1,000 years. According to excavation reports from the University of West Bohemia, the massive 6,500-year-old circular enclosure features twelve entrances designed by early farming communities to track solar and lunar cycles.
Discovering the Monumental Chleby Enclosure
Located near Nymburk and east of Prague, the prehistoric sanctuary spans approximately 230 meters across. Researchers from the University of West Bohemia found that the site was carved into the ground with a ditch measuring more than 2.5 meters deep. Twelve irregularly spaced entrances break the circular perimeter.
According to Petr Krištuf of the University of West Bohemia, who leads the archaeological research team, the geometry of these openings was intentional. The arrangement established a framework that allowed observers to track key turning points in the sun and moon cycles. Because no other circular enclosures from this era are known in the area, the Chleby Neolithic sanctuary stands out as unique even before factoring in any potential astronomical purpose.
A Prehistoric Calendar for Solstices and Lunar Cycles
Scientific analysis of the site indicates that early agrarian societies used the structure to mark major celestial events. The research team has identified two principal observation relationships.
One alignment appears to match the Moon’s furthest points on the horizon through its approximately 18-year cycle, while another connects the summer solstice sunrise with the winter solstice sunset. Organic material recovered from the site allowed researchers to date the construction more than a millennium before Stonehenge.
For early farming communities, these alignments held profound practical and symbolic weight. According to Krištuf, summer-solstice sunrise symbolized a beginning, while winter-solstice sunset marked an ending, providing a rhythm that may have helped communities organise work and gatherings.
Pro Tip: When investigating ancient astronomical locations such as Chleby or Germany’s Goseck Circle, keep in mind that structural alignments can facilitate seasonal tracking without reducing the entire location to a basic “calendar.” Similar caution applies to the solstice axis at Stonehenge, where human architecture and surrounding natural topography likely functioned in tandem.
Ritual Offerings, Bull Horns, and Bronze Age Burials
Excavations inside the deep perimeter ditch have yielded physical evidence of ancient rituals. Archaeologists uncovered bull skulls and horns positioned near the entrances. According to Jan Turek of Charles University, these remains likely decorated monumental gates, reflecting the cult of the bull as a central religious symbol for early European farmers.
Human remains also mark the site’s past. A prior investigation uncovered a Bronze Age burial ground associated with the Únětice Culture holding about eighteen individuals, who appear to have been interred within the grave across a prolonged timeframe. To gain deeper insight into the various functions the location served, such as craft-making and celebrations, Dr Jan Fišer of the University of Hradec Králové is carrying out soil analyses under the international research initiative titled Long-Term Land Use Dynamics in Prehistoric Ritual Areas.
In contrast to Stonehenge, which maintained its role as a ceremonial space through recurring use over time, investigators note that by the Iron Age starting around 800 BC, the sanctuary lost its original function after being repurposed as a dike, eventually giving way to the growth of a standard town.
Did You Know? The study of the Chleby sanctuary is a collaborative effort involving academic groups from Charles University (CU), the University of West Bohemia (UWB), and the University of Hradec Králové (UHK), all working together to shed light on how prehistoric ritual landscapes transformed over the ages.
Frequently Asked Questions
How old is the Chleby sanctuary?
The sanctuary dates back approximately 6,500 years, making it more than a millennium older than Britain’s Stonehenge.
Who is leading the excavation at Chleby?
The research is led by Petr Krištuf of the University of West Bohemia, in cooperation with Charles University and the University of Hradec Králové.
What celestial events do the entrances align with?
Researchers found alignments tracking the Moon’s extreme positions on the horizon during its roughly 18-year cycle, as well as sunrise at the summer solstice with sunset at the winter solstice.
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