Henry II is best remembered for his dubious part in the murder of Thomas Becket, archbishop of Canterbury. ‘The Plantagent Kings’ looks at the lives of the medieval English kings from the point of Henry II taking the throne in 1154. The crowning of Henry II was the first undisputed succession to the English throne in over a century. Despite his involvement in Becket's murder, Henry was a very successful ruler. He was followed by Richard I, then John, and Henry III, who ruled for over fifty years. Edward I found out that he was to be the next king in 1272 while travelling back from crusade. One of his main preoccupations was with Wales, culminating in the conquest of Wales.