The Church of Ireland building that was erected around 1831 has itself fallen into ruin within a rectangular graveyard; but beneath the soil somewhere to its east lies the ghost of an older, medieval structure that was demolished in the same decade the new church was going up. By the time anyone thought to record it, there was nothing left to see.

The medieval church at Lisronagh has a paper trail stretching back to the Ecclesiastical Taxation returns of 1319 to 1322, which place it among the recorded parishes of the period. In 1570 the Vicar of Lisronagh, one Peter Howet, became embroiled in a dispute with the collectors of Rectorial tithes over certain tithes of the parish; the judgement came down in his favour. By the early nineteenth century the medieval building was in sufficient decay that a replacement Church of Ireland church was constructed around 1831, and sometime in that same decade the old church was pulled down. The Ordnance Survey Letters, compiled not long after, noted foundations of a wall to the east of the new building that may have been the east gable of the vanished medieval church. Writing in 1907, Power could still report that some remains of the ancient church were visible in the graveyard beside the nearby tower house, a tall, fortified residential structure of late medieval type that stands about thirty metres to the north. That description no longer holds; nothing of the medieval fabric now survives above ground.

What does survive is a late medieval graveslab, positioned at the east gable of the ruined Church of Ireland building. It is a quiet, easily overlooked object, but it connects the site to a depth of use that the visible ruins alone do not suggest.