he Norman Heritage looks at the Norman Conquest as a turning point in English history. The book argues that not only was this the last time that England was successfully invaded, but it followed a complete change in the ruling dynasty, the introduction of military feudalism, the reform of the church and the rapid spread of monasticism. The book suggests that such social and political changes were accompanied by dramatic architectural and topographical developments. Frenzied building activity resulted in the construction of cathedrals, churches, monasteries and castles and stone was used on a scale unknown since the end of the Roman Empire.