It was moved, at some point, from a nearby structure known as Garrison Castle, and its current position in the graveyard wall is less an act of preservation than a kind of improvised rehoming. The plaque carries the Ormond coat of arms alongside a Latin inscription, and it is one of a pair that once formed part of the castle's fabric.

The Butlers of Ormond were among the most powerful Anglo-Norman dynasties in medieval and early modern Ireland, and armorial plaques of this kind, carved stone panels displaying a family's heraldic identity, were a common way of marking ownership and asserting status on a building's exterior. That two such plaques from Garrison Castle ended up reused in a graveyard wall suggests the castle fell into disuse or ruin at some stage, and that someone thought it worth salvaging the carved stonework rather than letting it disappear entirely. The Latin inscription has not been transcribed in available sources, but its presence alongside the heraldry points to a formal, declarative purpose, the kind of text that announces lineage or authority rather than simply decorating a surface.