The Irish state has officially approved the following list of national monuments in County Louth. In the Republic of Ireland, a structure or site may be deemed to be a "national monument", and therefore worthy of state protection, if it is of national importance. If the land adjoining the monument is essential to protect it, this land may also be protected.
A national monument in the Republic of Ireland is a structure or site, the preservation of which has been deemed to be of national importance and therefore worthy of state protection. If the land adjoining the monument is essential to protect it, this land may also be protected.
Athclare Castle is a Tudor tower house in the Dunleer area of County Louth in Ireland. Built in the 1550s, Athclare was built for the Barnewell family, and is typical of defensive architectural structures built in the Pale during the Tudor period in Ireland. Athclare has been extended and adapted in the centuries since its construction and is classified as a site of National social historical importance by the Irish National Inventory of Architectural Heritage.
Aghnaskeagh Cairns is a chambered cairn and portal tomb forming a national monument in County Louth, Ireland.
