An Observatory of Earth and Wood
The Goloring is a large, circular earthwork created during the late Bronze Age Urnfield culture, between 1200 and 800 BCE. Located in a former military training area near Koblenz, the structure is technically a henge, a type of monument more common in Britain. A defining feature of a henge is a circular ditch with an earthen bank on the outside, which suggests a ritual or astronomical purpose rather than a defensive one.
The scale of the Goloring is substantial. Its outer bank measures 190 meters in diameter, enclosing a circular ditch that is 175 meters across. The ditch itself is 5 to 6 meters wide and about 80 centimeters deep. Inside the ditch lies a raised, level platform with a diameter of 95 meters. Excavations at the very center of this platform revealed the remains of a massive wooden post, estimated to have been 50 centimeters thick and standing 8 to 12 meters high. This central post was a main feature of the site, likely being a primary observational point. The overall design has proportional similarities to Stonehenge in England.
Tracking the Lunar Cycle
Analysis of the Goloring's geometry suggests it functioned as a sophisticated astronomical calendar. The primary theory, supported by computer modeling, is that the site was designed to track the lunar standstill cycle. A lunar standstill is the point where the Moon reaches its northernmost or southernmost rising and setting points on the horizon. This cycle, which takes 18.6 years to complete, would have been a significant event for ancient sky-watchers.
From the central post, sightlines across the outer bank and to the horizon would have aligned with these key lunar events. The Urnfield people, who built fortified settlements and were skilled bronze workers, possessed the organizational capacity for such large-scale construction. Their interest in celestial events is also shown by the discovery of elaborate golden cone-shaped hats from the same period, which are covered in solar and lunar symbols like disks and crescents. The Goloring represents a monumental effort to build a precise astronomical instrument using only earth and timber.