The photograph, catalogued as GB89.H.14, shows distinctive cropmarks forming a rectilinear enclosure surrounded by two ditches, or fosses as they’re known in archaeological terms. These marks appear in crops because the buried ditches retain more moisture than the surrounding soil, causing plants above them to grow differently and creating visible patterns only detectable from above.

Moated sites like this one were typically built between the 13th and 14th centuries, serving as fortified homesteads for Anglo-Norman settlers and wealthy Irish families. The double-ditch system at Bogtown suggests a substantial defensive structure; the outer fosse would have been filled with water, creating a formidable barrier, whilst the inner ditch provided an additional line of defence. The rectilinear shape, rather than circular, points to Anglo-Norman influence, as these rectangular moated sites were common in medieval England and Wales before being introduced to Ireland during the Norman invasion.

The discovery of this site through aerial photography demonstrates how modern survey techniques continue to unveil Ireland’s hidden medieval landscape. Dr Gillian Barrett compiled this finding for the Archaeological Survey of Ireland in 2009, adding to our understanding of medieval settlement patterns in County Louth. Whilst nothing remains visible at ground level today, the cropmarks preserve the footprint of what was once likely a bustling farmstead, complete with a timber hall, outbuildings, and perhaps gardens, all protected within the secure confines of the water-filled moats.