Trim castle is an Anglo-Norman castle, possibly the first stone castle in Ireland. It is located about 28 miles northwest of Dublin in County Meath, along the banks of the River Boyne. Trim has been described as “the finest and largest castle in Ireland”
It was built primarily by Hugh de Lacy and his son Walter, from the 11th century. de Lacy took possession of the present building in 1172. The Castle was used as a centre of Norman administration for the Liberty of Meath, one of the new administrative areas of Ireland created by Henry II of England and granted to Hugh de Lacy.
During the late Middle Ages, Trim Castle, still the centre of administration for Meat, marked the outer northern boundary of The Pale.
Today the castle is semi ruined, but still worth a visit. It is in use and open to public