Heisterburg

Heisterburg is a medieval ring fort in Bad Nenndorf built with walls and ditches to form a defensive circle. The site features two gate structures with inward-facing designs and represents a type of stronghold common in northwestern Germany during the medieval period.

The fort was built between the 9th and 12th centuries on a ridge of the Deister mountain range. It served as a boundary marker and control point between different medieval jurisdictions in Lower Saxony.

The site served as a meeting point and boundary marker between medieval territories for centuries. Visitors can sense how its hilltop position made it a central location in the region's social geography.

The site is freely accessible and allows visitors to walk around the walls and explore the gate structures. The location on higher ground offers clear views of the surrounding landscape from various points.

Archaeological investigations have uncovered evidence of medieval metalworking and craft activities within the fort. These discoveries reveal that the site served not only military purposes but also housed productive economic operations.