Police are investigating a break-in at Alfreton Hall.
The hall, in Church Street, was broken into some time between 5pm on Friday, 29th July and 9.15am the following morning.
A large stone was used to smash a front window and the office area was searched. It is unclear whether anything was taken.
l Anyone with information should call police on 0345 123 3333 or Crimestoppers on 0800 555 111.