That deliberate incompleteness is quietly arresting. The cross is plain, unadorned, cut into a slab measuring roughly 1.62 metres tall and 0.46 metres wide, and it raises a question that the stone itself declines to answer.

The scholar R. A. S. Macalister recorded this slab in 1916 to 1917, classifying it as twelfth-century in type. A cross-slab, in the broadest sense, is simply a flat stone incised or carved with a cross, one of the most common forms of early medieval grave marker in Ireland, though the variation between individual examples can be considerable. What makes this one linger in the mind is the open foot of the cross, a feature Macalister noted specifically. Whether that gap was intentional, symbolic, or the result of the carver's particular tradition is not recorded. Inis Cealtra itself was a significant monastic settlement from at least the early medieval period, associated with Saint Colum of Terryglass, and its graveyard complex preserves layers of burial and devotion accumulated across many centuries.