It is the kind of remnant that tends to be overshadowed by the grander architecture built over or beside it, yet its presence suggests that this site was already of some significance before the Browne family raised their celebrated house in the 18th century.

Westport Demesne sits on land with deep roots in the story of Connacht. The estate came into the possession of the Browne family, later the Marquesses of Sligo, following the upheavals of the 17th century, and it was they who eventually commissioned the formal landscaping and mansion associated with the site today. A 16th or 17th century structure on the same demesne would belong to an earlier layer of that history, possibly connected to the transition between Gaelic landholding and the plantation and post-plantation settlements that reshaped ownership across Mayo during that period. Such houses from this era were typically modest by later standards, built for function and defence as much as comfort, and their survival within demesne boundaries often owes something to the later owners incorporating or simply tolerating earlier fabric rather than clearing it away entirely.