The Irish state has officially approved the following List of National Monuments in County Roscommon. 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.

National Monuments

NM# Monument name Description Image Townland Location
559 Altore Wedge TombWedge TombAltore 53°42′17″N 8°40′50″W / 53.704854°N 8.680440°W / 53.704854; -8.680440
488 Ardcarn MoundMound & RingfortArdcarn 53°57′42″N 8°12′32″W / 53.961651°N 8.208779°W / 53.961651; -8.208779
682 Castle NaghtenMotte and BaileyCastle Naghten.jpgBallycreggan 53°27′11″N 8°03′38″W / 53.453164°N 8.060492°W / 53.453164; -8.060492
362 Roscommon AbbeyFriary (Dominican)Roscommon Abbey.JPGBallypheasan 53°37′29″N 8°11′30″W / 53.624693°N 8.191776°W / 53.624693; -8.191776
487 Carnagh West RingfortRingfortCarnagh West 53°30′48″N 8°02′39″W / 53.513346°N 8.044055°W / 53.513346; -8.044055
473, 294 RathcroghanArchaeological ComplexTulsk 53°48′07″N 8°18′14″W / 53.802°N 8.304°W / 53.802; -8.304 (Rathcroghan)
586 McDermott's CastleCastleCastle Island in Lough Key Forest Park.jpgCastle Island (Lough Key) 53°59′22″N 8°13′57″W / 53.98948°N 8.232625°W / 53.98948; -8.232625
320 Castlestrange stoneSculptured StoneIMG CastlestrangeStone2771.jpgAthleague 53°35′13″N 8°16′19″W / 53.5869536°N 8.2718327°W / 53.5869536; -8.2718327 (Castlestrange stone)
557 Inchmacnerin AbbeyPriory (Augustinian)Church Island (Lough Key) 53°59′40″N 8°15′39″W / 53.994493°N 8.260788°W / 53.994493; -8.260788
181 Roscommon CastleCastleRoscommon Castle.JPGRoscommon 53°38′07″N 8°11′36″W / 53.63541°N 8.19326°W / 53.63541; -8.19326 (Roscommon Castle)
608 Cloonshanville High CrossHigh CrossCloonshanville 53°52′03″N 8°23′24″W / 53.867399°N 8.38999°W / 53.867399; -8.38999
650 Drummin fortRingfort & Ogham StonesDrummin 53°50′04″N 8°22′08″W / 53.834358°N 8.368769°W / 53.834358; -8.368769
397 Emlagh High CrossHigh crosses: two shafts and head fragmentsEmlagh High Cross.jpgEmlagh 53°44′43″N 8°27′23″W / 53.745382°N 8.456292°W / 53.745382; -8.456292
167 Boyle AbbeyAbbey (Cistercian)Boyle Abbey Nave 1997 09 17.jpgKnocknashee 53°58′25″N 8°17′49″W / 53.973611°N 8.296944°W / 53.973611; -8.296944 (Boyle Abbey)
556 Trinity AbbeyAbbey (Premonstratensian)Trinity Island (Lough Key) 53°59′21″N 8°15′16″W / 53.989215°N 8.254515°W / 53.989215; -8.254515

Sources