The city of Brunswick, located on both sides of the Oker, was originally split between Halberstadt and Hildesheim until it passed to Duke Henry the Lion in 1142, who made it his residence.
Braunschweigi linn, mis asetseb Okeri mõlemal kaldal, oli algselt Halberstadti ja Hildesheimi vahel jaotatud, kuni see läks aastal 1142 hertsog Heinrich Lõvile, kes tegi sellest oma residentsi.