Calenberg Castle

Calenberg Castle is the ruin of a medieval lowland water castle in the Leine floodplain near Schulenburg, a village roughly 15 km south of Hannover. Construction began in 1292 under Welf Duke Otto the Strict, who had the fortress built on a chalk-marl ridge between two branches of the Leine river. In the 15th century the castle lent its name to the entire Principality of Calenberg, making it the toponymic origin for a significant territorial entity in Lower Saxony. Rebuilt as a proper fortress in the early 16th century, it lost strategic importance after the Thirty Years' War and was demolished. Today only low wall remnants and earthworks survive in the floodplain meadows — a quiet, barely signposted ruin that rewards visitors with an interest in Welf dynastic history and the understated atmosphere of a largely forgotten medieval site.