Clough Castle is an excellent example of an Anglo-Norman castle with an added stone tower. A small kidney-shaped bailey lies south of a large mound, originally separated from it by a 2.1m deep ditch. On top of the 25 ft high motte is a stone tower, enlarged to become a tower house in the 15th century. It is sited off-centre as much of the rest of the top of the motte was occupied by a large hall, which apparently burned down. Around the motte is a ditch, and on the south-east side a low crescent shaped bailey, which was probably once joined to the motte by a wooden bridge.
Excavations on the summit of the mound in 1950 revealed that originally (in the late 12th or early 13th century) the top of the motte was surrounded by a timber palisade within which were pits for archers. Also found was the foundation of a long rectangular hall in the north-east half of the area, probably built in the mid 13th century. Later in the same century a small rectangular stone keep was built to the south-west, two storeys high and surviving to this day, having been conserved in 1981-82. In the late Middle Ages, after what appears to have been a period of disuse, it was restored and added to, resulting in an L-shaped tower house.
References:The Walls of Constantinople are a series of defensive stone walls that have surrounded and protected the city of Constantinople (today Istanbul) since its founding as the new capital of the Roman Empire by Constantine the Great. With numerous additions and modifications during their history, they were the last great fortification system of antiquity, and one of the most complex and elaborate systems ever built. They were also the largest and strongest fortification in both the ancient and medieval world.
Initially built by Constantine the Great, the walls surrounded the new city on all sides, protecting it against attack from both sea and land. As the city grew, the famous double line of the Theodosian Walls was built in the 5th century. Although the other sections of the walls were less elaborate, they were, when well-manned, almost impregnable for any medieval besieger.