Shanbally Castle was commissioned c. 1812 for Lord Lismore, who kept it as his principal seat until his death in 1857. The property then devolved to his only surviving son,
George O'Callaghan, 2nd Viscount Lismore. Following the deaths of his two sons, the 2nd Viscount Lismore bequeathed Shanbally to the great-granddaughters of his mother's brother
John Butler, 17th Earl of Ormonde, Lady Beatrice Butler and
Lady Constance Butler, who inherited the Castle and Estate following the deaths of Lord Lismore in 1898 and his widow in 1900. The peerage of
Viscount Lismore became extinct following Lord Lismore's death. In 1899 the Shanbally Estate was worth an estimated £25,000 annually, although the actual income produced was likely £18,500. Lady Beatrice, her husband
Lt. Gen. Sir Reginald Pole-Carew, and Lady Constance hosted
the King,
the Queen, and
Princess Victoria at Shanbally on 3 May 1904. In December 1946 the house was being advertised for long-term rentals in
Country Life Magazine, which listed the owner as the
Shanbally Estate Company. The advertisement described the Castle as containing nine reception rooms, fourteen bedrooms, six dressing rooms, servants apartments, central heating, telephone and electrity access, and thousands of acres of shooting rights in addition to the land comprising the Castle's demense. The house continued to be advertised as being available for rent, including as a
"country club, hotel, or other similar purpose" in December 1947, and reportedly then contained 8 reception rooms (including those allocated for servants), 28 bedrooms, six bathrooms, partial central heating, and 7,000 acres of shooting rights. Following the deaths of Lady Constance in 1949 and Lady Beatrice in 1953, the estate was sold by Lady Beatrice's younger son Major Patrick Pole-Carew to the Irish Land Commission during the 1950's. ==Destruction==