It is easy to walk past without registering what you are looking at, but the geometry is too deliberate to be natural: an earthen bank running from south-southeast to north-northeast, enclosing an oval space roughly 32 metres along its longer axis and 23.5 metres across, with a shallow external fosse, a ditch dug around the outside of the bank, completing the boundary on one arc while a natural scarp does the same work elsewhere.

This is the form of a ringfort, or at least something closely related to one. Ringforts, which survive in their thousands across Ireland, were typically enclosed farmsteads of the early medieval period, their banks and ditches marking out a defended domestic space. The Loughlea example sits on a gentle east-facing slope and is modest in its dimensions, its banks rising only about half a metre internally and slightly more on the outside. What complicates the picture is a later intervention: at some point after the enclosure fell out of its original use, someone built a stone-faced earthen field boundary straight across the interior, running roughly north-northwest to south-southeast, dividing the old enclosed space into two. It is a very ordinary thing, a field division of the kind found across the Irish countryside, and yet here it cuts through what was once a coherent and purposeful shape, leaving the archaeology half-erased by agricultural practicality.