Ruislip Castle is an 11th century motte and bailey castle.
Introduced into England by the Normans, as a means to subdue and administrate local populations.
A timber castle would have stood on the raised motte (mound), beyond would have been a bailey (fortified enclosure) containing a cluster of huts.
Both would have been surrounded by a palisade and moat, part of the moat still survives today.
The castle was probably occupied for a very short period as there’s no record of Ruislip Castle in the Domesday book, however, groundwork on the site has been dated to the 9th century.