National monuments in County Louth

The Monasterboice () ruins are the remains of an early Christian monastic settlement in County Louth in Ireland, north of Drogheda. The ruins are a national monument of Ireland and also give their name to the local village and to a civil parish of the same name.

first Cistercian abbey to be built in Ireland

castle located in Carlingford, County Louth, Ireland

UNESCO World Heritage site in County Louth, Ireland

Ruined castle in County Louth, Ireland

Clochafarmore (, meaning "stone of the great man") is a menhir (standing stone) and National Monument in County Louth, Ireland.

barbican in Drogheda, Ireland

fortified medieval tower house in Ardee, County Louth