King Richard II (1367-1400), son of Edward the Black Prince, was crowned at age ten, with the regency of a council headed by John of Gaunt. His achievements when an adolescent in negotiating an end to the Peasants' Rebellion, 1381, were not lived up to when he ruled the country as king. He alienated Parliament, was deposed in 1399 and died (probably murdered) a prisoner at Pontefract Castle. This collection of historical documents, a chronicle of English kings and rules for activities at the royal court was made during Richard's reign. It is possible that the king had it made for his ally, Thomas de Mowbray. Its miniatures resemble closely others surviving in manuscripts decorated for the monks of Westminster Abbey as well as a few linked to Richard II, who apparently was an outstanding royal patron of painters. The Wilton Diptych (in the National Gallery, London), probably his personal devotional shrine, represents him before English royal saints adoring the Virgin and Child. The Treaty of Chartres or Bretigny was settled by Richard II's grandfather, Edward III, with King John of France (1360) during the 'Hundred Years' War' and brought English sovereignty over Gascony and Calais. The first letter of the treaty, the I of 'Iohan', is in the shape of the standing figure of King John, the first letter of his name. This is one of a series of copies of treaties and other documents which expanded English sovereignity, affirmations of royal power in the extreme upheavals during Richard's reign .