Duke of Lauenburg
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The title Duke of Lauenburg derives from the Duchy of Lauenburg, which has been ruled by various people since its foundation in 1269.
It was held by various countries such as France from 1803 – 1805, Prussia from 1805 – 1806, the Kingdom of Westphalia, 1806 – 1810, France from 1810 – 1814 to the House of Oldenburg i.e. (the Kings of Denmark) from 1814 – 1864. In 1864, with the Second Schleswig War, it came under Prussian control. The title was awarded to Otto von Bismarck, after his dismissal as Chancellor of Germany in 1890.