The example at Lisheen in County Clare is a rath, the term used for an earthen ringfort, typically a roughly circular enclosure defined by one or more banks and ditches. These structures were the farmsteads of early medieval Ireland, built and occupied broadly between the fifth and twelfth centuries, and used as enclosed settlements where a family and their livestock could live with a degree of protection and social definition. That so many survive at all, even in degraded form, owes something to a long-standing folk belief that disturbing a ringfort brings misfortune, a superstition that has quietly preserved what centuries of farming might otherwise have erased.

The placename Lisheen is itself suggestive. It derives from the Irish loisín, a diminutive of lios, another word for a ringfort or enclosed dwelling place, which means the townland name may well echo the very monument it contains. Clare is particularly rich in such survivals, its landscape still legible with the earthworks of an agrarian society organised around kinship and cattle. Raths like this one were not fortifications in any military sense but rather enclosed homesteads, their banks marking the boundary between the domestic world and the open countryside beyond.