Carlow Castle

Carlow Castle stands in ruins in the heart of Carlow town, County Carlow, on the eastern bank of the River Barrow near its meeting with the River Burren. Built in the early 13th century, around 1207 to 1213, it is attributed to William Marshal, Earl of Pembroke and Lord of Leinster, who established the town of Carlow at about the same time and hoped to use the Barrow as a trade route.

The castle was one of a small group of early Norman stone fortresses known as four-towered keeps, originally a rectangular block of principal chambers guarded by cylindrical towers at each corner. Related examples credited to William Marshal include Ferns Castle in County Wexford, Lea Castle in County Laois and the original Kilkenny Castle. Over the following centuries the castle served as an administrative centre, military stronghold and residence, and for periods in the late 14th century it housed the Exchequer when royal administration was based at Carlow.

Much of the structure was lost in 1814, when a local physician, Dr Philip Parry Middleton, who had acquired the building and hoped to convert it into an asylum, set explosive charges at its base. The blast destroyed most of the interior, leaving the west wall and two of the towers standing. These fragments survive today as a striking reminder of the town’s Norman origins.

The ruins are located at Castle Hill in Carlow town and are managed as a heritage site. Visitors planning a trip can contact Carlow Tourism for the latest access information.