Coat of arms of the Dauphin. Since 1344, after the attachment of Dauphiné to the kingdom of France, the eldest son of the king of France bears the title of Dauphin and governs this province. However, in 1333, a decision by Philip VI of Valois made the king's son Duke of Normandy (John, known as "the Good", the first to bear this title since John the Great, received the attributes in the cathedral of Rouen). The presence of these arms in Caen is therefore in the order of things, especially since the Dauphin Charles (future Charles V) took an active part in the 14th century in the fight against the English and Navarrese during the first part of the Hundred Years War.