Ireland · Partial ruin
Carlow Castle
Caisleán Cheatharlach
Carlow Castle is an early 13th-century towered keep located beside the River Barrow in County Carlow, Ireland. Constructed c. 1207–1213 and commonly attributed to William Marshal, the stone castle comprised a large rectangular central tower with four three-quarter-circular corner towers and three storeys with timber upper floors. It was largely destroyed by explosives in 1814; today only parts of the west wall and adjacent towers remain and it is a National Monument of Ireland.
First raised
1210
Its prime
1213
Today
Partial ruin
Ranked among Europe’s castles
As it stood in 1213
What Carlow Castle looked like in its prime.
A massive rectangular stone keep measuring about 16 by 9.2 metres, its plan punctuated by four projecting three-quarter-circular corner towers each about 4.6 metres across; wall thickness is roughly 2.7 metres. The inner tower rises in three storeys with timber used for the upper floors. The long west wall contains built-in stairways and two garderobes and the main entrance is set into the first-floor wall. The castle stands beside the River Barrow.
Its story
The story of Carlow Castle.
Ireland's First Towered Keep, 1207-1231
The earliest written record of the castle at Carlow dates from 1231, and it does not name a builder. The work is widely assumed to be William Marshal the elder's, raised between 1207 and 1213, the years he spent in Ireland. What went up beside the River Barrow was the first of its kind in the country: a towered keep, in which a large rectangular tower is ringed by four smaller three-quarter-circular towers set at the corners of the rectangle.
The inner castle measured 16 by 9.2 metres, the corner towers 4.6 metres across, the walls 2.7 metres thick. It rose three storeys, the upper floors carried on timber. The long west wall held the stairways and two latrines, the latter an indication that the space was divided, and the entrance door was set at first-floor level. Whether the building served the traditional function of a keep, a refuge of last resort, has been doubted: it departs from the contemporary standard in England and on the Continent in having no towered curtain, no gatehouse and no undivided great hall. Castles of similar plan were erected in the same period at Ferns, Lea and Terryglass.
Crown, Confiscation and Cromwell, 1306-1650
The castle was handed over to the crown in 1306 and granted in 1312 to Thomas Plantagenet. The crown confiscated it in 1537, the landlords being absent. The Earl of Thomond bought it in 1616, after which it changed hands several times, until Oliver Cromwell took it in 1650; it was later returned to the Earl of Thomond.
The 1814 Demolition and the National Monument
In 1814 the castle was widely destroyed with explosives, in an attempt to open up more space for its conversion into a lunatic asylum. Only the outer face of the long west wall and the two towers beside it could be preserved. That fragment is protected as a National Monument of Ireland.
Step inside
7 places to explore in 1213.
The record describes 7 distinct spots at Carlow Castle, including 4 interiors: west wall stairways, west wall latrines (garderobes), corner tower interior chamber and more. Create your own photoreal reconstruction and explore every one, more scenes means more rooms, more angles, and more of the place to stand in.
Build Your Own Castle
Recreate Carlow Castle with AI to explore it.
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Clans who held Carlow Castle.
The families that held Carlow Castle for a decade or more across its history, follow a name to its clan.
Marshal
Built between 1207 and 1213, widely attributed to William Marshal the elder during his years in Ireland.
Thomond
Bought by the Earl of Thomond in 1616, and returned to the earl after Cromwell took the castle in 1650.
