Christian IX became king in 1863 after the childless Frederik VII and was the first regent of the Glücksburg line of the Royal Family. He married in 1842 Princess Louise of Hesse-Kassel, with whom he had six children. Christian IX managed to get four of his children placed on thrones around Europe, earning him the nickname “Europe’s Father-in-Law”. Christian IX (1818 –906) was King of Denmark from 1863 to 1906 and Duke of Schleswig, Holstein and Lauenborg from 1863 to 1864. Todays stamp is from 1904 and is the first issue from Denmark showing a portrait of the king.