She served as regent of Burgundy during the minority of her son's reign in 1306–1311.

She was the youngest daughter of King Louis IX of France and Margaret of Provence of the Royal House of Barcelona.

She married Robert II, Duke of Burgundy[2] in 1279, and became the mother of eight children.

On the death of her husband in 1306, Agnes served as regent of Burgundy for her minor son Hugh until he reached adulthood in 1311.

She died at Côte d'Or, December 1327, and is buried at Abbaye de Cîteaux.