Margaret of Bavaria was Duchess of Burgundy by marriage to John the Fearless. She was the regent of the Burgundian Low Countries during the absence of her spouse in 1404–1419 and the regent in French Burgundy during the absence of her son in 1419–1423. She became most known for her successful defense of the Duchy of Burgundy against Count John IV of Armagnac in 1419.
16th-century anonymous painting of Margaret
The tombstone of John the Fearless and Margaret of Bavaria in Dijon
Margaret of Bavaria on her tombstone in Dijon
John I was a scion of the French royal family who ruled the Burgundian State from 1404 until his assassination in 1419. He played a key role in French national affairs during the early 15th century, particularly in the struggles to rule the country for the mentally ill King Charles VI, his cousin, and the Hundred Years' War with England. A rash, ruthless and unscrupulous politician, John murdered the King's brother, the Duke of Orléans, in an attempt to gain control of the government, which led to the eruption of the Armagnac–Burgundian Civil War in France and in turn culminated in his own assassination in 1419.
Copy of an original from c. 1415 by Rogier van der Weyden
Miniature showing John the Fearless's assassination on the bridge at Montereau, painted by the Master of the Prayer Books