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.
John Frederick II, Duke of Saxony John Frederick II of Saxony (8 January 1529 – 19 May 1595), was Duke of Saxony (1554–1556).