Sites and Monuments Record · Ireland
Souterrain
Grallagh (gallen By.), County Mayo, Ireland
The record
- Townland
- Grallagh (gallen By.)
- County
- Mayo
- Country
- Ireland
- First-edition OS map
- Cave
- Latest-edition OS map
- Cave
- Coordinates
- 53.90540, -9.10505
- SMR number
- MA071-063002-
Slide toward Today to fade the historical sheet and see the modern map underneath.
David Rumsey Map Collection, Stanford LibrariesDavid Rumsey Map Collection, Stanford LibrariesDavid Rumsey Map Collection, Stanford LibrariesDavid Rumsey Map Collection, Stanford Libraries
Shown on 4 historical map sheets, the earliest the 1753 "Mappa geographica Regni Hiberniae" (David Rumsey Map Collection, Stanford Libraries).
This record in the National Monuments Service's Historic Environment Viewer ↗
The National Monuments Service's description
In a rath (MA071-063001-).
This souterrain is marked as ‘Cave’ in the NW quadrant of the rath on the 1838 and 1931 OS 6-inch maps. A sunken oblong hollow (5.5m NE−SW) lies adjacent to the rath scarp at NW. This is a collapsed souterrain chamber or passage. The subsidence slumps down toward the NE end of the hollow where an intact drystone wall is exposed. The wall (H 2m) describes a gently curve N−E in plan, suggesting that it is the intact NE end of the oblong chamber (Wth 2m). It is constructed of ten courses of large stone blocks, gently corbelled towards the top to support a roof lintel. The top of the wall underlies a layer of sod and topsoil (D 0.3m).
An E−W row of four large prostrate slabs lies embedded in the ground surface 6m to S, these may be roof lintels –possibly displaced. There is a slight hollow in ground surface adjacent to the eastern-most stone.
Compiled by: Jane O’Shaughnessy
Date of upload: 6 August 2021
Nearby in the register
- Ringfort - rathunder 1 mi
- Enclosureunder 1 mi
- Ringfort - rathunder 1 mi
- Ringfort - rathunder 1 mi
Other entries of the same register within about three miles of this one, by straight line.