A well-preserved stone circle is already at the site near Keswick
A dig to unearth the remains of a 14th Century manor house and stone circle is to take place in the Lake District.
The search will take place at Castlerigg, near Keswick, where there is already a well-preserved stone circle dating from 3,000 BC.
The hunt is taking place after a farmer found what he believed to be the remains of a manor in his field.
It will be lead by Bassenthwaite Reflections with the permission of English Heritage.
Volunteers with an interest in history are being urged to take part.
A spokesman for the Castlerigg survey, said: "Aerial photographs and ground searches have revealed markings of two potentially important sites.
"There are 14th century references to the castle, which was abandoned around 1460. Notes written in 1770 state the ancient seat of the lords of the manor of Derwentwater went into ruins.
"In trying to find evidence of the manor we'll be looking for building foundations and trenches.
"Our volunteers will also be asked to try to find buried stones or filled in sockets which might have formed a ring."