In level pasture in the townland of Cluggin, County Limerick, there was once a ringfort, a type of circular enclosure, typically defined by an earthen bank and ditch, that served as a farmstead or place of enclosure during the early medieval period in Ireland. Thousands of ringforts survive across the Irish countryside, many of them still legible in the landscape. This one, known as Rathnagallee, has entirely disappeared.

The 1897 edition of the Ordnance Survey 25-inch map recorded Rathnagallee clearly: a circular enclosure approximately 35 metres in diameter, positioned just north of a stream that marked the meeting point of two townland boundaries, the boundary between Cluggin and Newtown North still running along that same watercourse today. When the Archaeological Survey of Ireland visited in 2008, surveyors noted that no surface remains were visible at all. Spoil material had been dumped in the area, possibly associated with the construction of agricultural sheds to the south-east of the site, and by the time aerial orthophotography was examined, for periods between 2011 and 2013 and again in November 2018, the levelled monument had left no discernible trace even from above. The record was compiled by Alison McQueen and Vera Rahilly and uploaded in July 2020.

There is, practically speaking, nothing to see at Cluggin. The stream to the south-west remains, and the general field pattern is still there, but the earthwork itself has gone. What makes the site worth knowing about is precisely this absence: it is a documented example of how quickly a monument that endured for more than a millennium can be erased within a generation or two of modern agricultural activity. For anyone researching landscape loss or the fate of recorded monuments in the Irish midlands and west, the contrast between the 1897 map depiction and the blank pasture of recent satellite imagery is quietly instructive. The site sits in ordinary farming country, unremarkable to the eye, which is rather the point.