 It is a costly piece with a perch and gilt borders".In such surroundings the de Cusacks, Lords of Killeen, lived, made war, and expanded their fiefdoms for 225 years until the castle passed to the Plunketts through the marriage of Lady Joan de Cusack to Christopher Plunkett of Rathregan in 1399.The first Plunkett to hold the castle, Sir Christopher, became the 1st Baron Killeen, and divided his estate between his elder two sons, the second son taking possession of sister castle, Dunsany, and later becoming the 1st Baron Dunsany.