Arthur III, duke of Brittany (born 1393)

Arthur III, Duke of Brittany

Duke of Brittany from 1457 to 1458

Arthur III, more commonly known as Arthur de Richemont, was briefly Duke of Brittany from 1457 until his death. He is noted primarily, however, for his role as a leading military commander during the Hundred Years' War. Although Richemont briefly sided with the English once, he…