Carlow Castle

Carlow Castle is a medieval fortress standing near the River Barrow with a rectangular central keep flanked by two surviving circular towers. The thick stone walls clearly demonstrate Norman construction methods and give a sense of the strength this structure once provided.

William Marshal, Earl of Pembroke, built this fortress between 1207 and 1213 to control an essential river crossing during the Norman settlement of Ireland. It later became the seat of Irish government administration and remained significant until damage from an attempted conversion project in the 1800s.

The castle once served as a center of administrative power in medieval times and held significance for the Norman rulers who controlled the area. The remaining walls tell the story of its importance to those who governed from this location.

The site is open to visitors and easy to navigate since the remaining structures are compact and close together. Weather can affect visibility and comfort during exploration, so choosing a clear day helps you see the details more clearly.

In 1814 a doctor attempted to convert the castle into a psychiatric hospital, but an explosion during renovations destroyed a large portion of the remaining walls. This unfortunate incident left the ruin in the shape visitors see today.

Location: Carlow

Inception: 1210s

Founders: William Marshal, 2nd Earl of Pembroke

GPS coordinates: 52.83630,-6.93594

Latest update: December 8, 2025 19:46