About Jeanne de Nevers, Duchess of Brittany
Joanna of Flanders (c. 1295 – September 1374), also known as Jehanne de Montfort and Jeanne la Flamme, was consort Duchess of Brittany by her marriage to John IV, Duke of Brittany. She was the daughter of Louis I, Count of Nevers and Joan, Countess of Rethel, and the sister of Louis I, Count of Flanders. Joanna organized resistance and made use of diplomatic means to protect her family and her country. In the siege of Hennebont, she took up arms, dressed in armor, and conducted the defence of the town. She eventually led a raid of soldiers outside the walls of the town and demolished one of the enemy's rear camps. She was an earlier patron for women, and a possible influence to Joan of Arc.