It measured nineteen inches long, fourteen wide, and eleven deep, modest enough to sit on a kitchen table, yet substantial enough to have been recorded and remembered. Today, nothing of it can be seen above ground.

The sole surviving description comes from the historian William Carrigan, who included it in his 1905 work on the history and antiquities of the Diocese of Ossory. Carrigan was a meticulous recorder of Catholic ecclesiastical remains in the region, and his notes often captured objects and structures that were already fading from the landscape by his time. The altar he described had cut stone sides, suggesting it was a deliberate construction rather than a natural feature adapted for use. Whether it belonged to a domestic chapel, a penal-era mass site, or some earlier devotional context, the notes do not say. Outdoor or semi-concealed altars were common in Ireland during the eighteenth century, when the Penal Laws restricted Catholic worship and congregations gathered at improvised sites in fields, against ditches, or in remote hollows. The scale of the Baunaghra altar is consistent with those modest arrangements.

Nothing is visible at the site today. What remains is the measurement, the material, and Carrigan's careful notation of something that, even in 1905, was probably already more memory than monument.