The Archbishopric of Bremen was an ecclesiastical state in the Holy Roman Empire. It did not include the city of Bremen, but rather the area to the north of it, between the Weser and Elbe Rivers.
The state was secularized by the Lutherans in Sweden by the Peace of Westphalia in 1648, which also fully recognized the secularization, and changed the territory's status from an Archbishopric to a Duchy. Following the Great Northern War, the Duchy was given to the Elector of Hanover in 1720, with whom it remained until the end of the Reich.
Bremen was captured and plundered, and the countship of Stade seized and held by Henry.
In 1712 the territory became a possession of Denmark, and in 1715 was purchased by the electoral Prince George of Hanover.
Bremen with the surrounding territory was in 1731 recognized as a free city of the empire, and in 1803 received an increase of territory; in 1815 it entered the