Trim Castle

Trim Castle is a large Anglo-Norman fortress in Trim, County Meath, Ireland, founded in the late 12th century. It is noted as the largest Norman castle in Ireland by keep size and was a major administrative and military centre.

The most prominent feature is the stone keep, surrounded by curtain walls and baileys that form a substantial riverside castle complex. The site offers close-up views of medieval masonry and battlements and provides vantage points along the River Boyne.

The castle was begun by Hugh de Lacy and developed over subsequent decades by his family and successors, serving as a seat of Norman power and administration in medieval Ireland. Over time it fell into partial ruin and later conservation and archaeological work focused on stabilising and explaining the structure.

Trim sits on the River Boyne in County Meath, about 45 kilometres northwest of Dublin, and the castle occupies a central riverside position within the town.

• Age and builders: Construction began in the late 12th century under the Anglo-Norman lordship of Hugh de Lacy and his successors.
• Visitor access and viewpoint: Operated as a public heritage site with visitor access; a walk along the riverside offers clear views of the keep and defensive works.

What to See #

• Great keep: Massive stone keep measuring roughly the largest of its kind in Ireland, dominating the castle complex and visible from the riverside.
• Bailey and curtain walls: Curtain walls and outer baileys surround the keep and include remains of towers and gateworks that defined the defensive complex.