Hanover

Holy Roman Empire de facto · 1789 – August 6, 1806 (from the border data)
Kingdom of Prussia de facto · December 15, 1805 – July 9, 1807 (from the border data)
Kingdom of Westphalia de facto · July 9, 1810 – October 19, 1813 (from the border data)
Confederation of the Rhine de facto · September 1, 1810 – November 4, 1813 (from the border data)
Kingdom of Hanover de facto · October 12, 1814 – September 19, 1866 (from the border data)
German Confederation de facto · June 8, 1815 – May 18, 1848 (from the border data)
German Confederation de facto · November 29, 1850 – August 23, 1866 (from the border data)
Kingdom of Prussia de facto · October 1, 1866 – July 1, 1867 (from the border data)
North German Confederation de facto · July 1, 1867 – January 18, 1871 (from the border data)
German Empire de facto · January 19, 1871 – November 9, 1918 (from the border data)
Germany de facto · November 11, 1918 – May 8, 1945 (from the border data)
Germany de facto · since May 23, 1949 (from the border data)

Kingdom of Hanover October 12, 1814 – September 20, 1866 From Wikidata (capital, P36)