1542-1587. Queen of Scotland 1542-67. Also known as Mary Stuart, she was the daughter of James V. Mary's connection with the English royal line from Henry VII made her a threat to Elizabeth I's hold on the English throne, especially as she represented a champion of the Catholic cause. She was married three times. After her forced abdication she was imprisoned but escaped 1568 to England. Elizabeth I held her prisoner, while the Roman Catholics, who regarded Mary as rightful queen of England, formed many conspiracies to place her on the throne, and for complicity in one of these she was executed. Mary's mother was the French Mary of Guise. Born in Linlithgow (now in Lothian region, Scotland), Mary was sent to France, where she married the dauphin, later Francis II. After his death she returned in 1561 to Scotland, which, during her absence, had turned Protestant. She married her cousin, the Earl of Darnley, in 1565, but they soon quarrelled, and Darnley took part in the murder of Mary's secretary, Rizzio. In 1567 Darnley was assassinated as the result of a conspiracy formed by the Earl of Bothwell, possibly with Mary's connivance, and shortly after Bothwell married her. A rebellion followed; defeated at Carberry Hill, Mary abdicated and was imprisoned. She escaped in 1568, raised an army, and after its defeat at Langside fled to England, only to be imprisoned again. A plot against Elizabeth I devised by Anthony Babington led to her trial and execution at Fotheringay Castle in 1587.