Cahermone Castle lies on a farm, east of the town of Midleton in County Cork in Ireland.
Cahermone Castle was probably built around 1450, by John Fitzgerald, the third son of Maurice, Knight of Kerry. In 1579 the castle was renovated by John Fitz-Edmond Fitzgerald.
In the 1650's Cahermone Castle passed to Sir John Broderick. In 1786 the castle was still owned by the Brodericks. In the early 19th century, a Cahermone House was mentioned, being the residence of a Thomas Poole. Later that house was owned by a Laurence Smithwick.
Cahermone Castle is a rectangular tower house now standing to 4 storeys but originally higher. At the north side of the tower, connected to it, stand the remains of an early 17th century house. A short distance away on the south eastern side stood the 18th/19th century Cahermone House.
So I guess, the castle fell to ruin after it was abandoned in favor of the new house.
At present the ruin of Cahermone Castle is situated on the private grounds of a farm. I got permission from the owner to enter the site. A very nice tower house, too bad I couldn't get up to the upper floors.