Ringfort, Glascarn, Co. Westmeath
Co. Westmeath |
Ringforts
At Glascarn in County Westmeath, an earthwork that managed to escape every historical map survives only as a ghost in aerial photography.
The outline of a levelled oval enclosure, consistent with a ringfort, a type of enclosed farmstead typically dating from the early medieval period, emerged in Digital Globe imagery taken in November 2011, along with traces of a field system radiating outward from it. Nothing in the ground breaks the surface now; the site exists, for practical purposes, as a crop mark or soil shadow readable only from altitude.
What makes this particular find quietly significant is precisely its absence from the documentary record. Neither the nineteenth-century Ordnance Survey six-inch maps, the foundational layer of Irish archaeological mapping, nor any earlier run of aerial photography showed any sign of it. It appears on no edition of the OS maps whatsoever. That gap suggests the enclosure had already been levelled before systematic surveying began, or that local topography and land use conspired to keep it invisible until the right combination of season, crop, and camera angle briefly revealed it in late 2011.