It was built on a hill in the 11th century to protect the crossings of the Rivers Monnow and Wye. The oldest part remaining is the 12th century hall keep, though this was superceded by a new hall in 1370. Following the slighting in the Civil War the castle was abandoned and a new residence, Great Castle House, was built next to the ruins. The house is still used by the Royal Engineers and contains a military museum.
The town's defences include the Monnow river gate tower (below).
Open May to September.
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| In the town centre. |
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