Principality of Lüneburg
In 1705, the Principality of Lüneburg passed on to the Electorate of Hanover, and Wilhelmsburg became part of the Hanoverian state, which then subsequently became the Prussian Province of Hanover in 1866. In 1925, the Prussian authorities designated Wilhelmsburg as a city district, and merged it with nearby Harburg two years later to form the city of Harburg-Wilhelmsburg.