Richmond Castle in Richmond, North Yorkshire, England, stands in a commanding position above the River Swale, close to the centre of the town of Richmond. It was originally called Riche Mount, 'the strong hill'. The castle was constructed by Alan Rufus from 1071 onwards following the Norman Conquest of England, and the Domesday Book of 1086 refers to 'a castlery' at Richmond. In the 12th century, his great-nephew Conan expanded the castle and built the keep. Although it was derelict by 1540, it was restored centuries later. The property is the best-preserved early Norman castle in England and an important tourist attraction. Layout Richmond Castle consists of four main parts: a triangular main enclosure, an outer enclosure to the east, a keep at the northern corner of the main enclosure, and a small enclosure around the keep. History In 1069 William the Conqueror had put down a rebellion at York which was followed by his "harrying of the North" – an act of ethnic cleansing which depopulated large areas for a generation or more. As a further punishment, he divided up the lands of North Yorkshire among his most loyal followers. Alan Rufus, of Brittany, received the borough of Richmond and began constructing the castle to defend against further rebellions and to establish a personal power base. His holdings, called the Honour of Richmond, covered parts of eight counties and amounted to one of the most extensive Norman estates in England. A -high keep of honey-coloured sandstone was constructed at the end of the 12th century by Duke Conan IV of Brittany. The Earldom of Richmond was seized in 1158 by Henry II of England. It was King Henry II who probably completed the keep which had -thick walls. Modern visitors can climb to the top of the keep for of the town of Richmond. At the same time that the keep was probably completed, Henry II considerably strengthened the castle by adding towers and a barbican. Henry III and King Edward I spent more money on the site including Edward's improvements to the keep interior. In addition to the main circuit of the wall, there was the barbican in front of the main gate which functioned as a sealed entry space, allowing visitors and wagons to be checked before they gained entry to the castle itself. On the other side of the castle, overlooking the river, was another enclosure