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Carlow Castle: A Norman Stronghold on the Barrow

Explore the ruins of Carlow Castle, a 13th-century Norman fortress on the River Barrow, and discover its pivotal role in Ireland's medieval history.

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Carlow Castle, a ruined Norman castle built in the early 13th century by William Marshal, stands on the banks of the River Barrow. Once a formidable rectangular structure with cylindrical corner towers, today only two towers and a connecting wall remain, offering a glimpse into Ireland's medieval past.

A brief summary to Carlow Castle

Local tips

  • Visit during daylight hours to best explore the ruins and read the informational signs.
  • Combine your visit with a walk along the River Barrow for scenic views.
  • Check out nearby shops for refreshments to enjoy during your visit.
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Getting There

  • Walking

    Carlow Castle is located in the center of Carlow Town, making it easily accessible on foot from most points within the town. From the Carlow Bus Station or Carlow Train Station, it's approximately a 10-15 minute walk. Head towards the River Barrow; the castle ruins are situated on Castle Hill, overlooking the river. There are no specific costs associated with walking to the castle.

  • Public Transport

    Local bus services operate within Carlow Town. Bus Éireann operates two routes in Carlow Town: CW1 and CW2. Check local bus schedules for the most convenient route and stop. As of July 2025, a single adult fare is €1.50 with a Leap Card or €2.00 cash.

  • Taxi

    Taxis are readily available in Carlow Town. A short taxi ride from the Carlow Train Station or Bus Station to Carlow Castle will cost approximately €6-€8. Taxi services include Erin Cabs, Carlow Cab Service and Bridge Cabs Carlow.

Unlock the Best of Carlow Castle

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Discover more about Carlow Castle

Carlow Castle, situated where the Rivers Barrow and Burren meet in Carlow town, was erected in the early 13th century. William Marshal, often called “the greatest knight that ever lived,” is credited with building it between 1207 and 1213. The castle served as an administrative center, military fortification, and residence, showcasing Norman architecture in Ireland. The castle replaced an earlier Norman earthwork fortification. Its design, featuring a rectangular tower surrounded by four smaller, three-quarter-circular towers, was unique for its time in Ireland and may have been influenced by French castle architecture. Carlow Castle played a central role in the Anglo-Norman settlement of the Barrow Valley and even housed the Irish Exchequer for a period. Over the centuries, the castle changed hands multiple times and witnessed turbulent events, including the Irish Rebellion of 1641 and Cromwell's siege in 1650. In 1814, Dr. Philip Parry Middleton, seeking to expand a lunatic asylum, attempted to demolish the castle's interior using explosives, resulting in the destruction of most of the structure, leaving only the west wall and two towers standing. Today, the ruins of Carlow Castle are a National Monument and are free to visit year-round. Visitors can explore the remains, read informational plaques, and imagine the castle's former grandeur. The site offers a visual link to Ireland's past and is a must-see for history enthusiasts.

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