Where the more familiar earthwork ringfort was thrown up from ditched soil and turf, a cashel relied on whatever stone lay close to hand, and in the limestone and sandstone landscapes of the west of Ireland, that was rarely a shortage. These enclosures, typically dating from the early medieval period, between roughly the fifth and twelfth centuries, served as farmsteads for a single family or small household group, the circular wall defining both a practical and a symbolic boundary around dwellings, animals, and the routines of daily life.

The specific history of this cashel in Graffy remains largely undocumented in publicly available sources. What can be said is that Mayo's interior is scattered with such monuments, many of them sitting quietly in marginal agricultural land that was never dramatically redeveloped, which is partly why so many have survived at all. The cashel form is particularly associated with the west and south-west of Ireland, where stone was abundant and where early medieval settlement patterns left a dense archaeological footprint across the landscape. Graffy itself is a small rural townland, the kind of place where field boundaries and low walls can preserve the outline of much older enclosures simply because no one ever had strong reason to clear them away.