Principality of Lüneburg
In 1705, Elector George I Louis inherited the Principality of Lüneburg with the Duchy of Saxe-Lauenburg upon the death of his uncle Duke George William of Brunswick-Lüneburg. In 1715, he purchased the Duchies of Bremen-Verden from King Frederick IV of Denmark (confirmed by the 1719 Treaty of Stockholm), whereby his former landlocked electorate gained access to the North Sea.