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.
Louis Ferdinand, Prince of Prussia Louis Ferdinand Victor Edward Albert Michael Hubert, Prince of Prussia (German: "Louis Ferdinand Viktor Eduard Albert Michael Hubertus Prinz von Preußen"; 9 November 1907 – 26 September 1994) was a member of the royal House of Hohenzollern and pretender to the abolished German throne. He was also noteworthy as a staunch opponent of the Nazi Party, a businessman, and a patron of the arts.