A brief history of the crusades

Why did the medieval Church bless William of Normandy's invasion of Christian England in 1066 and authorize cultural genocide in Provence? How could a Christian army sack Christian Constantinople in 1204? This title unravels the story of the Christian military expeditions that have perturbed European history. Geoffrey Hindley instructively unravels the story of the Christian military expeditions that have perturbed European history, troubled Christian consciences and embittered Muslim attitudes towards the West.