when were the first castles built in europe
Castle A European innovation, castles originated in the 9th and 10th centuries, after the fall of the Carolingian Empire resulted in its territory being divided among individual lords and princes. These nobles built castles to control the area immediately surrounding them, and the castles were both offensive and defensive structures; they provided a base from which raids could be launched as well as protection from enemies. Although their military origins are often emphasised in castle studies, the structures also served as centres of administration and symbols of power. Urban castles were used to control the local populace and important travel routes, and rural castles were often situated near features that were integral to life in the community, such as mills, fertile land, or a water source.
Norman architecture In England, Norman nobles and bishops had influence before the Norman Conquest of 1066, and Norman influences affected late Anglo-Saxon architecture. Edward the Confessor was brought up in Normandy, and in 1042 brought masons to work on Westminster Abbey, the first Romanesque building in England. In 1051 he brought in Norman knights who built "motte" castles as a defence against the Welsh. Following the invasion Normans rapidly constructed motte-and-bailey castles, and in a burst of building activity built churches and abbeys, as well as more elaborate fortifications including Norman stone keeps.