Joan of Valois

Joan of Valois (1304–1363), known as Madame d'Artois, was the daughter of Charles, Count of Valois, and Catherine I of Courtenay, and half-sister of King Philip VI. About 1320 she married Robert III of Artois, who claimed Artois.

After Robert used forged documents and fled in 1331, Joan and her children were seized and confined at Château Gaillard. Her husband died in England in 1342, but she remained a prisoner for years; she died in July 1363 and was buried in Paris.