Caskieben (/kæskiːˈbɛn/ kahs-KEE-ben; Scottish Gaelic: Gasach beinn "Wooded Hill", later Keith Hall) Caskieben was a palisaded tower built by the Garviach family during the 12th-century Norman expansion into Scotland. It stood on a low, circular mound surrounded by a 2 metre deep, 15 metre wide moat.