The Royal Medal of Recompense was established by a king that was Duke of Schleswig during what years?
Christian IX of Denmark Christian IX (8 April 181829 January 1906) was King of Denmark from 1863 to 1906. From 1863 to 1864, he was concurrently Duke of Schleswig, Holstein and Lauenburg.
Ernst Gunther, Duke of Schleswig-Holstein Ernst Gunther, Duke of Schleswig-Holstein (August 11, 1863 – February 22, 1921) was a son of Frederick VIII, Duke of Schleswig-Holstein and Princess Adelheid of Hohenlohe-Langenburg. He inherited his father's title as titular duke of Schleswig-Holstein.