Brema

The Prince-Archbishopric of Bremen was an ecclesiastical principality between the Weser and Elbe, ruled from Vörde Castle after the city barred its archbishop. In 1337 its prince-archbishop was Burchard Grelle, a Bremen citizen's son.

Dithmarschen remained under the archbishopric until 1526, while the territory turned Lutheran in the sixteenth century. Ravaged during the Thirty Years' War, it was secularized by the 1648 Peace of Westphalia and awarded to Sweden as the hereditary Duchy of Bremen.