The Treaty of Picquigny was a peace treaty negotiated on 29 August 1475 between the Kingdom of England and the Kingdom of France. It followed from an invasion of France by Edward IV of England in alliance with Burgundy and Brittany. It left Louis XI of France free to solve the threat posed by Charles the Bold, Duke of Burgundy. The treaty also formally ended the Hundred Years' War, which had been informally finished since 1453.