Her husband Malcolm III, and their eldest son Edward, were killed in the Battle of Alnwick against the English on 13 November 1093. Her son Edgar was left with the task of informing his mother of their deaths. Not yet 50 years old, Margaret died on 16 November 1093, three days after the deaths of her husband and eldest son. The cause of death was reportedly grief. She was buried before the high altar in Dunfermline Abbey in Fife, Scotland. In 1250, the year of her canonization, her body and that of her husband were exhumed and placed in a new shrine in the Abbey. In 1560, Mary Queen of Scots had Margaret's head removed to Edinburgh Castle as a relic to assist her in childbirth. In 1597, Margaret's head ended up with the Jesuits at the Scottish College, Douai, France, but was lost during the French Revolution. King Philip of Spain had the other remains of Margaret and Malcolm III transferred to the Escorial palace in Madrid, Spain, but their present location has not been discovered.