John of Berry or John the Magnificent was Duke of Berry and Auvergne and Count of Poitiers and Montpensier. His brothers were King Charles V of France, Duke Louis I of Anjou and Duke Philip the Bold of Burgundy. He was Regent of France from 1380 to 1388 during the minority of his nephew Charles VI.
Image of John, Duke of Berry from the Très Riches Heures
John, Duke of Berry was the owner of the Fonthill vase, made in Jingdezhen, China, the earliest piece of Chinese porcelain documented to reach Europe, in 1338.
The Treaty of Brétigny was a treaty, drafted on 8 May 1360 and ratified on 24 October 1360, between Kings Edward III of England and John II of France. In retrospect, it is seen as having marked the end of the first phase of the Hundred Years' War (1337–1453) as well as the height of English power on the European continent.
Treaty of Calais Chest in the National Archives, Kew