The one at Glaspatrick, in County Mayo, is a case in point: a rath, which is the earthen form of ringfort typically consisting of one or more circular banks and ditches enclosing a domestic or agricultural space, sitting quietly in a landscape that has absorbed it into the ordinary texture of fields and townland boundaries.

Ringforts broadly date from the early medieval period, roughly the fifth to the twelfth centuries, and were used as enclosed farmsteads by families of varying social rank. The earthen rath was the most widespread type, built by cutting a circular ditch and throwing the spoil outward to form a raised bank. The place name Glaspatrick, found in several parts of Ireland, is generally associated with Saint Patrick, with the prefix "glas" suggesting a stream or green hollow connected to a site of early Christian significance, which hints at the kind of layered, intertwined history that tends to accumulate in townlands bearing his name. Whether the ringfort at this particular Glaspatrick has any documented relationship to such traditions is not currently recorded.