Archaeological evidence shows they began construction of the three main mounds by 1200.

Layers 8-4 on the main mound can be assigned to this period.

Large buildings atop the main mounds seemed to indicate temples or council houses.

Two smaller barrows were situated close to the five main mounds.

She and her husband, Karl, purchased the land around the main mound and donated it to the state in 1948.

The main mound was surrounded by a defensive ditch.

The only features visible are the main mound and moats.

The main mound was built up in four stages over the course of many years.

Two smaller mounds rise from the top of the main mound and rise above treetops offering a wide view.

A "suburb" off the main mound to the north may have comprised additional houses but is now all-but-destroyed through modern agriculture.