Granuaile's Castle, known in Irish as Carraig an Chabhlaigh ("Rock of the Fleet"), is the famous Rockfleet Castle in the townland of Rockfleet near Newport in Burrishoole parish, County Mayo. The castle is most renowned as the primary stronghold of Gráinne Ní Mháille (Grace O'Malley, c. 1530–1603), the legendary 16th-century maritime leader and chieftain's widow who commanded a sea kingdom span...