Burg Arnesvelde

Burg Arnesvelde is a medieval castle whose remains appear as earthen ramparts and moats across a large site on the eastern side of Hopfenbach Valley. The ruins spread over a wide area and include an oval hill with possible ring structures as well as a western ramp leading to a former pond.

The castle was founded in the second half of the 11th century by Count Heinrich I of Hamburg to govern the northeastern region of Stormarn and protect the trade route between Hamburg and Lübeck. It declined in importance as political and economic power shifted within the region during the medieval period.

The name references the medieval family that held authority here during the Middle Ages. Today visitors can walk among the ramparts and ditches to sense the region's medieval past directly, as the ruins remain embedded in the local landscape.

Visitors can explore the site along maintained walking paths equipped with information boards about the ruins and their history. The best time to visit is from spring through fall, when the paths are easy to walk and views of the earthen ramparts are clearest.

The castle appears in the upper field of Ahrensburg's coat of arms, showing its importance to the town's medieval identity. This connection in the heraldic image demonstrates how closely the castle's history is woven into the city's development.