What sovereign duke of the Duchy of Saxe-Coburg and Gotha, composed the opera Diana von Solange in 1858?
Ernest II, Duke of Saxe-Coburg and Gotha Ernest II (German: "Ernst August Karl Johann Leopold Alexander Eduard"; 21 June 1818 – 22 August 1893) was the sovereign duke of the Duchy of Saxe-Coburg and Gotha, reigning from 1844 to his death. Ernest was born in Coburg as the eldest child of Ernest I, Duke of Saxe-Coburg-Saalfeld, and his duchess, Princess Louise of Saxe-Gotha-Altenburg. Fourteen months later, his younger brother Prince Albert was born, who became consort of Queen Victoria of the United Kingdom. Ernest's father became Duke of Saxe-Coburg and Gotha in 1826 through an exchange of territories.
House of Bismarck The House of Bismarck is a German noble family that rose to prominence in the 19th-century, largely through the achievements of the statesman Otto von Bismarck. He was granted the hereditary title of Prince of Bismarck in 1871, a hereditary comital title in 1865 and a ducal title, Duke of Lauenburg, held only for his own lifetime. Several of Otto's descendants, notably his son Herbert, Prince of Bismarck, were also politicians.