The site represents one of Ireland’s better preserved examples of Norman defensive architecture, likely dating from the same period as the neighbouring church at Brookley.

The ringwork consists of a raised circular platform measuring 34 metres across, surrounded by impressive defensive features that speak to its military purpose. A two-metre-high scarp defines the central area, beyond which lies a substantial flat-bottomed fosse; essentially a defensive ditch; stretching seven metres wide and two metres deep. The outer defences comprise a flat-topped earthen bank standing two metres high, with evidence of stone revetment still visible along the northeastern section. Fragments of wall footings can be seen protruding from the scarp that encloses the platform, suggesting more substantial structures once stood here.

Access to this fortified site was controlled through a single causewayed entrance on the east-southeast side, measuring five metres wide. This type of ringwork represents an early form of castle building introduced by the Anglo-Normans in the 12th and 13th centuries, typically constructed quickly to secure newly conquered territories. The strategic hilltop location, combined with its proximity to the church, suggests this site played a significant role in controlling and administering the local area during the medieval period.