Rockfleet Castle (Carraig-an-Cabhlaigh), also known as Carrickahowley Castle, stands at the mouth of a small inlet on the northern shores of Clew Bay in County Mayo. The Castle is renowned for its links with Grace O`Malley (or Granuaile), a pirate sea Queen who inhabited the castle in the latter part of the 16th Century. Grace was reputed to have command of three galleys and some 200 fighting men with which she was able to give the merchant ships to and from Galway a hard time. In fact she became so successful in this that, in March of 1574, the English sent an expedition of ships and troops to put an end to her maritime exploits. They laid siege to the castle for many days but Grace turned the tables on them and the hunters became the hunted.