sentences:  Harbottle Castle
  
  Harbottle Castle is a ruined medieval castle situated at the west end of the village of Harbottle, Northumberland, England west-north-west of Rothbury overlooking the River Coquet.It is a Scheduled Ancient Monument and a Grade I listed building
  
  It is thought that the mound on which the keep stands was a site used by the ancient Britons and that in Anglian times there was a stronghold on the site held by Mildred, son of Ackman.