These enclosures, typically formed by an earthen bank or fosse, are among the most enduring traces of early Christian activity in the Irish landscape, often predating by centuries the parish structures that eventually replaced them.

Ecclesiastical enclosures of this type are generally associated with the early medieval period, roughly the sixth to the twelfth centuries, when the Irish church was organised around monastic communities rather than the diocesan model familiar today. The enclosure boundary served both a practical and a symbolic function, demarcating consecrated ground from the secular world beyond it. Many such sites were later absorbed into the layout of medieval parishes, with the enclosure boundary gradually softening into a field boundary or disappearing beneath later development. The Townplots site represents this class of monument in County Mayo, though the specific details of its form, condition, and any associated features remain, for the moment, lightly documented in the public record.