Ard Cill Mhártain, the height of St Martin's church, points to an early medieval foundation, and the ruined church that survives here is still recognisable as the reason the place was named at all. What makes the site worth pausing over is precisely this layering: a pre-Norman dedication folded into a post-medieval enclosure wall, with memorials stretching back to the eighteenth century filling the space between.

The graveyard at Ardkilmartin is roughly rectangular, measuring approximately 37 metres north to south and 48 metres east to west, enclosed by a stone wall built after 1700. The ruins of St Martin's Church, recorded in the Archaeological Survey of Ireland as LI040-088001, occupy the northern quadrant of the enclosure, which is a typical arrangement in Irish ecclesiastical sites where the church anchored one end of the burial ground rather than sitting centrally. The dedication to St Martin almost certainly refers to Martin of Tours, the fourth-century Gallo-Roman bishop whose cult spread widely across early Christian Ireland and is preserved in a scattering of place names across Munster and beyond. The entrance gate is positioned to the north, which is less common than a southern or western approach and gives the site a slightly different orientation to how one might expect to enter. The earliest surviving memorials date from the eighteenth century, compiled by Caimin O'Brien and uploaded to the national record in June 2019.

The site sits in County Limerick and is accessible from the road, with the northern gate serving as the main point of entry. The church ruin itself, though fragmentary, repays close attention; the relationship between its footprint and the surrounding wall makes the evolution of the site over several centuries legible in the ground beneath your feet. Eighteenth-century headstones in rural Limerick graveyards often carry locally distinctive lettering styles and iconography, including skull-and-crossbones motifs and hourglass carvings that were common in Irish funerary carving of that period. The enclosure wall, being post-1700 construction, is likely a formalisation of an older boundary, and the tension between that relatively recent stonework and the much older ruin it contains is what gives Ardkilmartin its particular quiet quality.