The placename itself offers a clue to an older layer of significance: Cill Cholgan in Irish, meaning the church of Colgan, most likely a reference to an early Christian foundation associated with a saint of that name, though the precise Colgan in question remains a matter of some uncertainty among scholars of early Irish hagiography.

Church sites bearing the cill prefix are among the most common monument types in the Irish landscape, yet no two are quite alike in their survival. Some retain substantial medieval stonework; others have been reduced to a grassed-over outline or a scatter of dressed stone absorbed into later field boundaries. Without detailed excavation or survey records available for this particular site, what can be said is that such foundations typically served local parish communities from the early medieval period onward, often continuing in use, in one form or another, through successive centuries of ecclesiastical reorganisation. The Kilcolgan area, positioned along an inlet that feeds into Dunbulcaun Bay, would have been well connected by water in earlier centuries, making it a plausible location for an early monastic or parish presence.

Very little detail about the physical condition or precise location of the remains is currently accessible in the public record, which itself says something about how many monuments in rural Ireland are still waiting for the documentation they deserve.