Blankenhagen Castle

Blankenhagen Castle, located near Grethem in Lower Saxony, Germany, is an archaeological site featuring the remains of a motte-and-bailey castle from the late Post-Classical Period, specifically around 1200 CE. The site consists of two artificial mounds or mottes, surrounded by remnants of a circular rampart and ditches, indicative of its defensive purpose. The higher mound has a 25-meter diameter and stands 4.5 meters high, while the other is triangular, measuring approximately 30 meters in length and 3 meters in height. These structures, now mostly overgrown with bushes, represent a strategic fortification likely established by the lords of Blankena, who had ties to Hodenberg Castle. Despite its lack of historical records, Blankenhagen Castle's physical attributes and strategic location highlight its significance in the medieval landscape of the Aller valley.