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Last Updated: Friday, 28 December 2007, 10:27 GMT
Campaign to save cave from damage
Royston Cave
The cave, beneath Royston town centre, is being damaged by lorries
An ancient cave in Herts - thought to have been used by the Knights Templar during their quest for the Holy Grail - is under threat, according to an MP.

The Royston Cave, believed to date back to the 13th Century, is being damaged by the weight and vibration of excessive heavy lorry traffic.

North East Herts MP Oliver Heald is now campaigning to save the cave.

English Heritage is also pressing for a weight restriction on Melbourn Street which is above the cave.

Mr Heald said: "I have written to both our local councils to press the case for measures to safeguard the cave."

Crucifixion wall carvings

He added: "I believe that there should be a weight restriction and strict enforcement of the no parking provision, so that we can save the cave."

Chief Executive of English Heritage, Dr Simon Thurley, has recently written to Mr Heald to confirm that "potential long-term damage due to the weight and vibration of continuing heavy traffic is of concern to us".

The cave is a man-made cavern in the shape of a beehive, with a small aperture at the top for ventilation.

Inside are wall carvings representing the Crucifixion, the Holy Family and several saints, including St Katherine, St Laurence and St Christopher.

Local historians have said the wall carvings suggest the cave may have been used by the Knights Templar.

The Knights Templar, a military order of the Roman Catholic Church, were suppressed by papal edict almost 700 years ago.

Royston Cave is managed by the Royston History Society on behalf of Royston Town Council.

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