A castle was built by the Peverel family in the 12th century and became Crown property in 1155 when William Peverel the Younger died. The Ferrers family who were Earls of Derby laid claim to the Peveril property. Bolsover Castle is a Scheduled Ancient Monument, a "nationally important" historic building and archaeological site which has been given protection against unauthorised change. It is also a Grade I listed building (first listed in 1985) and recognised as an internationally important structure.