Monarch is a word that means king or queen. Denmark is the oldest monarchy in Europe. The current monarch is Queen Margrethe II, who has been the queen since 1972. Denmark does not currently have a King. Margrethe's husband was called a prince because he was the son-in-law, not the son, of the previous King. He died on 13. February 2018 at the age of 83. The royal couple have two children: