Yorkshire Walks, City of York

"The original mound of Clifford's Tower, with a timber structure at the top, was constructed by William the Conqueror in 1068 as a statement of his power over the region. This building stood for just over a century before being burnt down in one of York’s bloodiest and tragic moments, when, in 1190, 150 Jews were massacred on the site." www.historyofyork.org.uk/themes/norman/clifford-s-tower