United Kingdom-England 7
Round Tower
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The motte is 50 feet high and is made from chalk originally excavated from the surrounding ditch. The keep, called the Round Tower, on the top of the motte is based on an original 12th-century building, extended upwards in the early 19th century by 30 ft to produce a more imposing height and silhouette. The interior of the Round Tower was further redesigned in 1991–3 to provide additional space for the Royal Archives, an additional room being built in the space left by the originally hollow extension. The Round Tower is in reality far from cylindrical, due to the shape and structure of the motte beneath it.
