A vast prehistoric enclosure near Chleby in the Czech Republic may have served as a ceremonial site designed around movements of the Sun and Moon, archaeologists reported. Dating of organic material indicates that the approximately 6,500-year-old monument was built more than 1,000 years before the major construction phases of Stonehenge.
The nearly circular enclosure measures about 230 meters across and was surrounded by a ditch more than 2.5 meters deep. Researchers led by the University of West Bohemia identified 12 irregularly spaced entrances around its perimeter. They believe the arrangement was deliberate and may have produced sightlines toward significant astronomical events.
Two observation points are particularly important to the interpretation. One appears to correspond with the Moon’s most extreme positions on the horizon during its roughly 18-year cycle. Another establishes an alignment between sunrise at the summer solstice and sunset at the winter solstice. Researchers note that this arrangement has a broad parallel at Stonehenge, although the evidence does not indicate that the two monuments were directly connected.
Petr Krištuf of the University of West Bohemia, who leads the research, said the entrance geometry suggested that the enclosure was designed to observe key moments in solar and lunar cycles. The findings may indicate that astronomical observations were incorporated into monumental architecture by early farming communities considerably earlier than the best-known phases of Stonehenge.
Other discoveries support a ceremonial interpretation, although the site’s precise uses remain under investigation. Bull skulls and horns were found in the ditch, particularly near the entrances. Archaeologists believe some may once have been displayed on monumental gateways. Jan Turek of Charles University said cattle symbolism was important among early farming communities, but the researchers’ reconstruction of the gateways remains an interpretation.
Human remains also point to the enclosure’s continued significance. Earlier investigations found a later Bronze Age burial associated with the Únětice culture containing approximately 18 people. The individuals appear to have been deposited gradually rather than in one event.
By the Iron Age, the monument seems to have lost its original importance. The ditch was gradually filled, and an ordinary settlement was established on the former sanctuary. Researchers are now analyzing soil samples from the enclosure and surrounding landscape for chemical traces that could help identify activities carried out there and chart changes in the site’s use over time.
