Beneath or immediately around the Church of Ireland building erected here in 1805, the remains of an earlier medieval church and its associated burial ground are thought to lie, absorbed into the landscape of a later age and no longer traceable above ground. It is the kind of layering that recurs across Irish ecclesiastical sites, where centuries of use have left the oldest phases invisible, buried under foundations or levelled by successive generations of builders.

The ecclesiastical enclosure in which the 1805 church sits is itself a clue to the site's age. Such enclosures, typically defined by a curved or roughly circular boundary, are widely understood to mark early Christian foundations, often predating the Norman period. Kiltegan has been associated, at least in local tradition, with a figure named Tecan, said to have been a contemporary of St Patrick, which would place the site's origins in the fifth century. The scholar Liam Price noted this identification as far back as 1949, while also making clear that no evidence exists to support it. The name Kiltegan itself, from the Irish "Cill", meaning church, is suggestive of early foundation, but suggestive is as far as the record goes.

What makes the place quietly interesting is precisely this gap between claim and evidence. The Patrician association may be unprovable, the earlier church invisible, the medieval graveyard unexcavated, and yet the enclosure boundary persists, and the ground beneath the nineteenth-century building holds its secrets.