These circular enclosures, known in Irish as raths, were the most common form of rural settlement in early medieval Ireland, used primarily as farmsteads by families of middling status. A raised bank of earth, sometimes reinforced with a ditch, defined the boundary of the household inside, offering a degree of protection for people and livestock alike. That so many survive, in various states of preservation, across the Irish countryside is itself remarkable.

Castlegannon as a place name carries traces of the Norman period, the element "gannon" possibly a corruption of an older Gaelic name, though the ringfort itself almost certainly predates any Norman presence in the area. Kilkenny was a significant centre of Norman settlement following the twelfth-century invasion, and the landscape around it was substantially reorganised in that period. A rath in this townland would therefore represent an earlier, Gaelic-Irish layer of occupation, one that existed before the plantation of manors and the establishment of the medieval town that grew around Kilkenny Castle. The specific history of this particular enclosure, its dimensions, its condition, and any associated finds or features, remains formally undocumented in publicly available sources at present.