The site at Killaloan sits on a south-facing slope with the River Suir roughly 200 metres to the south, and the peculiar proximity of the two ruins, one medieval and one of Church of Ireland origin, makes it quietly compelling. Both are derelict, both are open to the sky, and together they compress several centuries of Irish ecclesiastical history into a very small square of ground.

The medieval church has a long documentary trail. It appears in Papal Chancery documents from 1210 and 1260 under the variant spellings 'Kilholouan' and 'Killoluwam', then in the Papal Tax records of around 1306 as 'Kildolowan', and again in the Calendar of Papal Registers in 1497 as 'Kylolohan'. By the time of the Civil Survey of 1654 to 1656, it was already described as 'a little Church unroofed', suggesting it had been abandoned well before the surveyors arrived. The Church of Ireland building immediately to the north was noted as 'a new Church' in the Ordnance Survey Letters of around 1840, though it too is now roofless and derelict. The medieval structure is rectangular, built of sandstone and limestone rubble in rough courses, with surviving walls rising to between 1.7 and 1.8 metres above the interior floor. Its east wall has collapsed to a low rubble line roughly 0.8 metres high, and the west wall has vanished entirely. A single-light window near the east end of the south wall retains three lower jambs of sandstone with an external chamfer, a simple decorative bevel cut into the stone edge. An east window with sandstone surrounds was recorded in the nineteenth century, but by then the ivy had already made its form impossible to read, and the situation has not improved since.