Chorley’s historic hall which was due to reopen to the public on Wednesday will remain closed for vital repairs.
Astley Hall has been closed since Christmas whilst conservation work was done to preserve the Grade 1 listed building.
But council chiefs have revealed a main wall in the Great Hall needs to be repaired before it can reopen to the public.
Jamie Carson, director at Chorley Council, said: “It is hugely disappointing that the Hall can’t reopen as planned, but it is more important to preserve this magnificent building for future generations.
“Conservation work started at Christmas and we were hopeful the Hall could reopen in time for Easter, but as the work progressed it unearthed more major issues that have to be dealt with as a matter of urgency.”
The work revealed that a foundation beam which supported a 400-year-old wall in the Hall had rotted and needs to be replaced.
The closure means that events that were to be held in the Hall will have to be postponed. Events planned for Astley Park, the coach house, farmhouse and walled garden will be unaffected by the Hall’s closure.
The events affected include Astley Alive! with the Friends of Astley Hall; The Easter bunny trail; Chorley Photographic Society’s annual exhibition; and Museums at Night annual UK festival.