The Norman castle keep of Clitheroe has dominated the skyline for more than 800 years since being built around 1186 by Robert de Lacy to protect the administrative centre of his vast estates. It is said to be the smallest keep in England, since the rooms are only about 20 feet square. The present entrance passes through what was originally a window into what was a cellar. The original entrance was on the right on the next floor. The keep was deliberately damaged after its capture by Parliamentary forces during the civil war, but was repaired in 1848 with smooth-faced limestone blocks, which can be clearly seen. The views from the old castle walls are breathtaking, as is the walk up the hill.