Marie of Champagne was the first Latin Empress of Constantinople by marriage to Emperor Baldwin I. She acted as regent of Flanders during the absence of her spouse from 1202 until 1204. Wikipedia
Born: 1174
Died: August 9, 1204 (age 30 years), Acre, Israel
Great-grandparents: Louis VI of France, Adela of Normandy, William X, Duke of Aquitaine, and more
Grandchildren: Guy, Count of Flanders, John I, Count of Hainaut, Baldwin of Avesnes, and more
Children: Margaret II, Countess of Flanders and Joan, Countess of Flanders
Spouse: Baldwin I, Latin Emperor (m. 1186–1204)