In a flat tillage field near Donadea in County Kildare, there is something that only reveals itself from the air. A large circular enclosure, roughly 52 metres in diameter, has no visible presence on the ground at all. What betrays it is a cropmark, the faint but legible signature that buried archaeology leaves in growing crops when soil disturbed by ancient digging retains moisture differently from the surrounding earth. Aerial imagery captured between 2013 and 2018 shows the outline clearly: a narrow fosse, or ditch, tracing a broad ring in the landscape, its circle nearly complete.

Circular enclosures of this kind are common features of the Irish archaeological landscape, though their functions varied considerably. Some enclosed settlement sites, others were used for ceremonial or funerary purposes, and many remain difficult to classify without excavation. What gives this particular site added interest is its proximity to a barrow, a burial mound catalogued separately, which sits approximately 80 metres to the east-southeast. The pairing of enclosures and barrows in the same field is not unusual in Irish archaeology, and the two features together suggest the area may have held some significance over a long period. The site was reported by Jean-Charles Caillere and, as of its documentation, had not been excavated or further investigated on the ground.