Becket had been a trusted friend of Henry II, King of England, but they became entangled in a quarrel over the rights of the Church. That dispute ended bitterly in 1170 when a group of Henrys knights, incited by their kings anger at the archbishop, Becket praying before altar of Canterbury Cathedral while three knights approach him from behind, one with his sword and killed him. Ancient painting in Chapel of holy Cross, Stratford. Date: 1170