|Native name |
Irish: Caisleán na Cúlchoille
View of Coolhill Castle overlooking the Barrow. Photo from 1865–1914.
|Location||Coolhill, The Rower,|
County Kilkenny, Ireland
|Official name: Coolhill Castle|
Coolhill Castle was built c. the 13th century. Henry de Rupe (de Roache, Roche) held lands at Coolhill in 1318. Art Óg mac Murchadha Caomhánach held the castle briefly during one of his campaigns. In the 1600s, about 30 de Rupe retainers were massacred at Rosbercon by English soldiers under De La Poer. The castle passed to the Mountgarret family in 1621 and was confiscated by the Roundheads in 1652.
A mural helical stairway leads to the upper floors. The ground floor room has large alcoves. It has a vaulted ceiling with some wicker-marks. There are three storeys above the vault. There is a fireplace on the second floor. The third floor contains a fireplace, garderobe and separate stairs to the roof. There are single-light, round and cross-shaped loopholes. 
- "Coolhill Castle - Ireland by Chance".
- Harrison, Peter (1 January 2004). "Castles of God: Fortified Religious Buildings of the World". Boydell Press – via Google Books.
- "Holdings: Coolhill Castle on the Barrow, The Rower, Co. Kilkenny".
- Carrigan, William (1 January 1981). "The History and Antiquities of the Diocese of Ossory". Roberts Brooks – via Google Books.
- "Coolhill Castle".
- "Talk on fascinating history of Dominican order in Rosbercon - Independent.ie".
- "Historic Castles of County Kilkenny Ireland".
- Limited, Alamy. "Stock Photo - Stone Stair case in Medieval Coolhill Castle in Kilkenny Ireland".
- Geocaching. "Coolhill Castle".