" The slaughter of Jerusalem in the days following its fall to the crusaders on Friday, July 15, 1099, was one of the atrocities of its age, an extreme example of the rights of a victorious party to withhold mercy from the vanquished, and a biblical wasting in keeping with other Norman-inspired massacres like William the Conqueror’s “Harrying” of northern England in 1069 and 1070. "

― Dan Jones , Crusaders: The Epic History of the Wars for the Holy Lands