that was founded around 800 by Saint Liudger as a mission station. Helmstedt's town privileges were documented in 1247. It belonged to the Abbacy of Werden until 1490, when it was bought by the Duchy of Brunswick-Lüneburg. From 1576 to 1810, the University of Helmstedt was located here.

From 1807 the town was part of the Napoleonic Kingdom of Westphalia,