News of Thomas à Becket’s martyrdom has spread throughout Christendom and the blame is laid at the feet of Henry Plantagenet, King of England. Two years later, with Becket canonised, Henry’s position is precarious: punished at the Pope’s insistence for his part in Becket’s death, he now also has an enemy in his Queen, Eleanor of Aquitaine, after her discovery of his longstanding infidelity with...