In a graveyard in County Kildare, what remains of a medieval church has collapsed so thoroughly that it now reads less as a ruin and more as a shallow dent in the ground. The outline of the building survives as a rectangular depression, roughly eight metres long and just over three metres wide, its edges marked by low mounds of ivy and sod-covered stonework; the tumbled walls have settled into the earth rather than standing above it. It is the kind of site that rewards a second look, where the eye needs a moment to resolve the disorder of vegetation and rubble into the ghost of a floor plan.

By 1294, this church, then recorded under the name Kyledonane, had already fallen into neglect. A contemporary source noted that it, along with a neighbouring church at a place recorded as Tristyldelane, was considered not worth the service of chaplains, suggesting that both communities had dwindled to the point where maintaining resident clergy was no longer viable. Medieval Irish parishes could be volatile things, their fortunes tied closely to local lordship, land tenure, and the shifting demographics of the rural population. Whatever congregation had once gathered at Killadoon had evidently thinned considerably by the late thirteenth century, and the building appears to have followed suit over the centuries that followed, leaving the collapsed walling that can still be traced today along the eastern and western ends of the depression.