This enigmatic enclosure, measuring roughly 54 metres from northeast to southwest and 29 metres from northwest to southeast, was first spotted from above during an aerial survey in 1986. Despite its substantial size, the site never made it onto the Ordnance Survey’s historic maps, remaining hidden in plain sight until modern technology brought it back into view.

The enclosure belongs to a category of archaeological features known as moated sites, which were typically built during the medieval period in Ireland. These rectangular or square earthworks, often surrounded by water-filled ditches, served as defended homesteads for Anglo-Norman settlers and prosperous Gaelic families. The Treanmanagh example sits just 65 metres northwest of another enclosure, suggesting this area may have been home to a small medieval settlement or agricultural complex.

Modern aerial photography has proven invaluable in documenting this site. Various orthoimagery captured between 2005 and 2018 clearly shows the rectangular earthwork’s outline, even though centuries of farming have softened its edges. The site’s visibility from above, combined with its absence from historical maps, highlights how much of Ireland’s archaeological heritage still awaits proper investigation; countless features like this one scattered across the landscape, their stories waiting to be uncovered through careful fieldwork and research.