The Hanovers split between Germans and English when British law allowed a woman, Queen Victoria, to rule while Hanoverian law didn't. Queen Marie's husband, George V of Hanover, and her were forced to leave Hanover because Hanover sided with Austria in the Austro-Prussian war that year and Prussia won. Prussia annexed Hanover. Her Wikipedia article is here.

1846 Marie, Queen of Hanover,the consort of George V and Prince Ernst August by Carl Wilhelm Friedrich Oesterley (location ?)
