There is precious little material available about this pretty well preserved Irish tower. It was built sometime in the fifteenth century by the FitzGeralds of Burnchurch in County Kilkenny. It is known for being one of several Irish towers with the slightly narrower sides of the castle extending up an additional floor, creating in essense a pair of tower wide turrets.
This furnishes a natural gable at both ends of the roof as well as an additional defensive level of battlements. There are numerous narrow rooms in the walls, including a “secret room” on the fourth floor. The rounded chimney may be a later improvement [that on the model is square], and the fireplace in the 5th floor Hall sports a “joggle voussoir arch”, whatever that is.
The castle originally had a bawn with a 41 foot tall tower at one corner. Though the old drawing, date unknown, shows remnants of buildings, only the round tower [see both below] appears to be standing in pictures I found on the internet and in a library book. Burnchurch was apparently last occupied in 1817, but it can be explored.