Alongside the remnants of that colonial history, the settlement contains a graveyard of sufficient antiquity and archaeological interest to warrant a formal monument record, placing it in the same category as ringforts, souterrains, and other physical traces of Irish life that predate or run parallel to the documentary record.

Castleblakeney itself sits in a landscape that saw considerable activity during the medieval period, when land in Connacht was reorganised under successive waves of Norman and later English settlement. Graveyards in such contexts often contain the only surviving evidence of earlier ecclesiastical foundations, whether a ruined church, a pattern of enclosure, or the outline of a former boundary that predates the current arrangement of fields entirely. Without more detailed information currently available, the specific origins of this burial ground, including whether it attached to a medieval parish church or an older monastic site, remain difficult to establish with precision.