The building that once occupied a high gravel bluff above a bend in the Dinin River in County Kilkenny is gone, not in the usual way of ruins softening gradually into the landscape, but suddenly and catastrophically, taken by the river itself. What remains is a graveyard on the slope, and beneath the surface, presumably, whatever the flood left behind.

Ordnance Survey letters compiled in 1839 record what had happened just four years earlier: the east gable of Teampall Maon, which had stood on the northern bank of the Dinin in the townland of Jenkinstown (also known as Corcalagh), was swept away along with a large portion of the adjoining graveyard during one of the river's periodic mountain torrents. The letter-writer noted that the gable had contained a single square window, which gives a small sense of what was lost. The church had been significant enough to appear on the Down Survey of 1655 to 1656, the seventeenth-century mapping project that recorded landholdings across Ireland following the Cromwellian conquest, where it features on the parish map of Mayne. Writing in 1905, the historian Carrigan described it as the prebendal church of Mayne or Moyne, a prebendal church being one whose revenues supported a cathedral clergyman known as a prebendary. Its patron was St Muicin, Bishop and Confessor, whose feast day falls on the fourth of March, though little else about him has been preserved in the record.

The site sits on the west bank of the Dinin, with open views across the valley in all directions. The church itself is no longer visible at ground level, but the associated graveyard survives and remains the only physical marker of what was once, by the evidence of its appearance on a seventeenth-century survey map, an established ecclesiastical presence on this bend of the river.