Christian X (Christian Carl Frederik Albert Alexander Vilhelm; 26 September 1870 – 20 April 1947) was the King of Denmark from 1912 to 1947 and the only king of Iceland (where the name was officially Kristján X), between 1918 and 1944.
He was a member of the House of Glücksburg and the first member of his family since king Frederick VII to have actually been born into the Danish royal family; both his father and his grandfather were born as princes of a German ducal family. Among his siblings was King Haakon VII of Norway.
His character as a ruler has been described as authoritarian and he strongly stressed the importance of royal dignity and power. His reluctance to embrace democracy resulted in the Easter Crisis of 1920, in which he dismissed the democratically elected cabinet with which he disagreed, and instated one of his own choosing. This was nominally his right in accordance with the constitution, but facing the risk of the monarchy being overthrown he was forced to accept democratic control of the state and the role as a nominal constitutional monarch.
In spite of becoming unpopular due to his resistance to democracy, during the German Occupation of Denmark he did become a popular symbol of resistance to German occupation, particularly because of the symbolic value of the fact that he rode every day through the streets of Copenhagen unaccompanied by guards.
With a reign spanning two world wars, and his role as a rallying symbol for Danish national sentiment during the German Occupation, he has become one of the most popular Danish monarchs of modern times.
The royal style of King Christian X initially was: "By the Grace of God, King of Denmark, the Wends and the Goths, Duke of Schleswig, Holstein, Stormarn, Dithmarschen, Lauenburg and Oldenburg". This style was used until 1918 when Iceland was elevated to an independent state in union with Denmark.
The full title of King Christian X from 1918 to 1944 was: "By the Grace of God, King of Denmark, Iceland, the Wends and the Goths, Duke of Schleswig, Holstein, Stormarn, Dithmarschen, Lauenburg and Oldenburg".
The full title of King Christian X following the 1944 dissolution of the Dano-Icelandic union was: "By the Grace of God, King of Denmark, the Wends and the Goths, Duke of Schleswig, Holstein, Stormarn, Dithmarschen, Lauenburg and Oldenburg".