These circular enclosures, known in Irish as raths, were the farmsteads of early medieval Ireland, typically defined by one or more earthen banks and ditches thrown up around a central living area. Tens of thousands once existed across the island; several thousand survive in Kerry alone, many of them still faintly visible as grassy rings on hillside and field edge.

The Banshagh example belongs to that long catalogue of sites whose recorded existence outpaces what is currently known about them in any documented detail. What can be said with confidence is that the rath as a form was in widespread use from roughly the fifth to the twelfth centuries, serving as an enclosed homestead for a farming family of some local standing. The earthen banks were not primarily military in function but marked territory, contained livestock, and signalled status. In Kerry, where the density of ringforts is particularly high, they cluster across lowland pasture and mountain foothills alike, and many have given their names to the townlands that grew up around them.