This rectangular platform, measuring approximately 30 metres north to south and 22 metres east to west, rises subtly from the surrounding fields, its edges defined by an ancient scarp and the remnants of what was once a water-filled defensive ditch, or fosse. A small mound occupies the southeast corner of the earthwork, adding another layer of archaeological interest to this rural site.

The site at Ballynagoul tells an interesting story through historical maps. It doesn’t appear on the 1840 Ordnance Survey Ireland six-inch map, suggesting it may have been overgrown or considered unremarkable at that time. By 1897, however, cartographers had recognised its significance, carefully documenting the rectangular platform on the 25-inch map series. Today, modern technology offers new perspectives; Google Earth imagery clearly reveals the sub-rectangular outline of the monument, with the scarp and fosse still visible as subtle variations in the landscape despite centuries of agricultural use.

These moated sites, found scattered across the Irish countryside, were typically constructed between the 13th and 14th centuries by Anglo-Norman settlers or prosperous farming families. The raised platform would have supported a timber hall or farmstead, whilst the surrounding water-filled ditch provided both defence and drainage. Though now reduced to earthworks in reclaimed pasture, sites like Ballynagoul offer tangible connections to medieval Ireland’s complex social landscape, where settlers established fortified homesteads that served as both agricultural centres and symbols of authority in the Limerick countryside.