It carries a classified presence in the archaeological record, meaning someone at some point considered it significant enough to document, yet the details of what it actually is, what it looks like, and what it might once have been used for have not yet been made publicly available.

The name Tóin An Tseanbhaile is Irish, meaning roughly "the bottom" or "rear end" of the old settlement, a type of townland name that often points to the tail end of an ancient inhabited place, the marginal ground at the edge of where people once lived and worked. Such names are common across Connacht and frequently correspond to areas where earlier occupation left physical traces, whether the remains of field systems, enclosures, or structures of uncertain function. Whatever stands or lies at this location in Mayo, it has been deemed a structure worthy of classification, even if the classification currently tells us little more than that.