Known in Irish as a ráth, a ringfort is essentially a circular enclosure defined by one or more earthen banks and ditches, built during the early medieval period, roughly between the fifth and twelfth centuries, as a farmstead and place of protection for a family and their livestock. There are estimated to be around forty thousand of them across the island, and yet each one occupies a specific patch of ground with its own particular history, its own alignment, its own relationship to water and to neighbouring settlements.

Lismorris is a small townland in Clare, a county whose landscape holds a remarkable concentration of early medieval remains, shaped partly by the relative stability of land use in certain areas over the centuries. The rath here is one of countless such enclosures that were once the basic unit of rural life in Gaelic Ireland, home to a farming family of some local standing. The earthen banks that defined these sites served a practical purpose, keeping cattle in and wolves or rival claimants out, but they also carried social meaning, marking the boundary between the domesticated interior and the wider world beyond. Many raths were later absorbed into local folklore as the dwelling places of the sídhe, the supernatural beings of Irish tradition, which is one reason so many survived undisturbed when more pragmatic considerations might have seen them levelled.