A modern church stands in the graveyard at Lackagh More, and on the face of it there is nothing unusual about that. What makes this site quietly odd is the absence at its core: beneath or close to the present building, a medieval church has vanished so completely that no surface trace of it remains. The ground, particularly a slightly raised area to the south, may be all that marks where it once stood.

By the time John Taylor surveyed County Kildare in 1783, the original church was already recorded as a ruin, which means it had been falling apart for some time before anyone thought to map it. The medieval building was eventually replaced by the modern structure, but a small material clue may have survived the transition. A carved stone now serving as a burial marker within the graveyard is thought to have come from the older church: a round window head, roughly half a metre wide, preserved not in any museum case but lying flat among the graves, repurposed in the most pragmatic way imaginable. A second fragment, a window transom, a horizontal bar that would originally have divided a window opening into lights, may have a different origin entirely. At around 65 centimetres long, it is tentatively linked not to the church but to Lackagh Castle, the remains of which lie approximately 35 metres to the west-southwest, close enough that stones from both structures could easily have been moved, reused, or confused over the centuries.