ORIGINALLY a Norman motte and bailey castle, Raglan Castle was rebuilt in the mid 15th century by Welsh knight, Sir William ap Thomas. Although it suffered during the Civil War, the structure still remains and it is a Grade One listed building.
But according to local action groups, the National Assembly's conservation arm Cadw and the Environment Agency, plans to build a cattle market under its ramparts will threaten its future.
The proposals are for a £3m unit, six hectares in size and 40ft high.
As well as ruining the ancient monument's view, Cadw say the plans would affect the archeological remains of the Great Pool, a vast ornamental lake.
Locals have appealed to the castle's owner, the Duke of Beaufort, to intervene.