Margaret I of Denmark

Margaret I was Queen of Denmark and Norway from 1387 and Queen of Sweden from 1389 until her death, and the founder of the Kalmar Union that joined the Scandinavian kingdoms together for over a century. Margaret was known as a wise, energetic and capable leader, who governed with "farsighted tact and caution," earning the nickname "Semiramis of the North". She was derisively called "King Breechless", one of several derogatory nicknames invented by her rival Albert of Mecklenburg, but was also known by her subjects as "the Lady King", which became widely used in recognition of her capabilities. Knut Gjerset calls her "the first great ruling queen in European history."