Margaret Of Denmark, called the Semi-ramis of the North, queen of the united kingdoms of Denmark, Sweden, and Norway, horn in Copenhagen in 1353, died in Flensbufg, Oct. 28, 1412. She was the third daughter of Wal-demar III., king of Denmark, and at the age of 10 was married to Haco, king of Norway. Upon the death in 1387 of Olaf, the offspring of this marriage, and the king of Denmark and Norway, she procured her election as queen of the former kingdom, and by skilful management soon after secured the crown of Norway. In 1388 the Swedes, who were oppressed by their king Albert, having offered her the throne of that kingdom, she defeated Albert, who after seven years' imprisonment was released on condition of formally resigning his crown. Thenceforth she reigned with absolute authority. "When urged to secure an heir to her thrones by another marriage, she promised to designate a successor, and at the assembly of the estates of the three kingdoms at Calmar, in 1397, presented to the deputies her grand-nephew Eric as her appointed heir. On this occasion, by her eloquence and address, she procured the adoption of a fundamental law, called the "Union of Calmar," establishing a perpetual union of the three kingdoms. Eric was at the same time associated with her in the government.

Although holding extreme opinions on the royal prerogative. Margaret was in the main a just, magnanimous, and successful sovereign.