Oberndorf is a municipality in the district of Cuxhaven

Cuxhaven (district)

Cuxhaven is a district in Lower Saxony, Germany. It is bounded by the districts of Stade, Rotenburg, Osterholz and Wesermarsch, the city of Bremerhaven and the North Sea.- History :...

, in Lower Saxony

Lower Saxony

Lower Saxony is a German state situated in north-western Germany and is second in area and fourth in population among the sixteen states of Germany...

, Germany

Germany

Germany , officially the Federal Republic of Germany , is a federal parliamentary republic in Europe. The country consists of 16 states while the capital and largest city is Berlin. Germany covers an area of 357,021 km2 and has a largely temperate seasonal climate...

.

Oberndorf upon Oste belonged to the Prince-Archbishopric of Bremen, established in 1180. In 1648 the Prince-Archbishopric was transformed into the Duchy of Bremen, which was first ruled in personal union

Personal union

A personal union is the combination by which two or more different states have the same monarch while their boundaries, their laws and their interests remain distinct. It should not be confused with a federation which is internationally considered a single state...

 by the Swedish Crown - interrupted by a Danish occupation (1712–1715) - and from 1715 on by the Hanoverian

House of Hanover

The House of Hanover is a deposed German royal dynasty which has ruled the Duchy of Brunswick-Lüneburg , the Kingdom of Hanover, the Kingdom of Great Britain, the Kingdom of Ireland and the United Kingdom of Great Britain and Ireland...

 Crown. The Kingdom of Hanover

Kingdom of Hanover

The Kingdom of Hanover was established in October 1814 by the Congress of Vienna, with the restoration of George III to his Hanoverian territories after the Napoleonic era. It succeeded the former Electorate of Brunswick-Lüneburg , and joined with 38 other sovereign states in the German...

 incorporated the Duchy in a real union

Real union

Real union is a union of two or more states, which share some state institutions as in contrast to personal unions; however they are not as unified as states in a political union...

 and the Ducal territory became part of the new Stade Region

Stade (region)

The Stade Region emerged in 1823 by an administrative reorganisation of the dominions of the Kingdom of Hanover, a sovereign state, whose then territory is almost completely part of today's German federal state of Lower Saxony...

, established in 1823.