Principality of Brunswick-Wolfenbüttel
From 1292 to 1302, Prince-bishop Siegfried II of Querfurt had the "Levenborch" spur castle erected in the Salzgitter Hills, near where his episcopal lands bordered on the Principality of Brunswick-Wolfenbüttel. From 1366 it was pawned by his successors to the citizens of Braunschweig, important to secure the trade route to the Imperial City of Goslar.