Though earlier fortifications were built on the same spot, the current keep was built by the MacCarthy of Muskerry dynasty, a cadet branch of the Kings of Desmond, and dates from 1446.
Meskipun benteng sebelumnya dibangun di tempat yang sama, bangunan yang kini dibangun oleh dinasti MacCarthy dari Muskerry, cabang kadet (bungsu) Raja Desmond, yang berasal dari tahun 1446.