Osterburg, Water castle in Krummhörn, Germany.
Osterburg is a fortified water castle in Krummhörn completely surrounded by water-filled moats. The structure combines medieval defensive features with regional building methods typical of Northern Germany.
The castle was built in the medieval period as a defensive fortification and was part of a regional network of strongholds along the Northern German coast. Over centuries, it lost its military purpose but has been preserved as a historical structure.
The castle shows how medieval residents lived and how the water defenses served both protection and daily needs of those inside. Visitors can see how water functioned as both a defensive tool and a practical part of everyday life.
The castle is not always open to visitors and is especially showcased during Heritage Day in September. It helps to check opening times beforehand and plan your route, as the site sits in a rural location.
The castle remained in private ownership for centuries and was inhabited by the same family managing it since medieval times. This continuity makes it a rare example of living history rather than just a preserved ruin.
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