Enclosure, Kilballyowen, Co. Limerick
Co. Limerick |
Enclosures
Somewhere beneath the improved pasture of Kilballyowen, about 140 metres south-west of the townland boundary with Patrickswell, an ancient enclosure has been quietly persisting, entirely invisible to anyone walking across the field above it.
No earthwork survives, no stones protrude, and the site appears on none of the Ordnance Survey's historic maps. The only way this monument has ever been seen is from the air, and only under the right conditions: when differential crop growth, caused by buried features affecting moisture and nutrients in the soil, produces faint discolouration patterns known as cropmarks. These ghostly outlines, legible from altitude but imperceptible at ground level, are among archaeology's more unsettling phenomena.
The enclosure was first identified during the Bruff aerial photographic survey in 1986, recorded in survey images 208.01 and 208.02. What the cameras captured was a roughly oval-shaped cropmark sitting within the centre of a larger, rectilinear one. The oval measures approximately 35 metres on a north-west to south-east axis and 28 metres north-east to south-west. The outer rectilinear feature is considerably larger, around 60 metres by 56 metres, and appears to be open at its south-south-west side. An enclosure, in Irish archaeological terms, typically refers to a defined area bounded by a bank, ditch, or wall, sometimes associated with settlement, ritual, or agricultural use, though the function of any particular example usually requires excavation to establish. The nested arrangement here, one form contained within another of different shape, is the detail that makes this site particularly intriguing. The cropmarks have since been confirmed by multiple sources: Ordnance Survey Ireland orthoimagery taken between 2005 and 2012, Digital Globe imagery from 2011 to 2013, and a Google Earth image captured on 20 September 2020, all showing the same pattern persisting across decades.
The site is not publicly accessible in any formal sense, and there is nothing to see on the ground. Modern development has already encroached on the south-west portion of the outer rectilinear cropmark, where the corner of a house plot and a small field now sit; the north-east boundary of that field runs across and bisects the central oval feature. For those interested, the aerial evidence compiled by Alison McQueen and Vera Rahilly, uploaded to the record in November 2020, provides the clearest available picture. The most productive approach for the curious is to seek out the Bruff survey imagery and compare it against current satellite views, watching for how the cropmark holds its shape across different seasons and imaging conditions.