lun Castle was constructed shortly after the Norman Conquest by Robert 'Picot' de Say, a follower of William the Conqueror. Situated in the area called the Welsh Marches, the castle's location was designed to stop the Welsh attacking the area and to control the local Anglo-Saxons. A motte and bailey style castle would have been the first type of castle on the site. The castle was built on two existing mounds that next to the river Clun. Two or three baileys were built on the mounds and would probably have had an interconnecting bridge between the main two. At some point the original wooden castle was replaced in stone and as part of that reconstruction, the keep was built. The keep is the only large section of the castle that remains today and can be seen in the photograph on the left.