What survives at Mountpleasant in County Wexford is modest in scale but quietly puzzling: two partial walls, a chamfered window set into an arched embrasure, a small brick-built opening in the north wall, and, inside the roofless shell, the remains of a brick vault. That vault is the only sign anywhere on the site that the dead were ever commemorated here.

The chapel was almost certainly a private or estate chapel, attached to Tagunnan Castle, which sits roughly fifty metres to the east alongside a moated site, the kind of water-filled or embanked enclosure that typically served a defensive or manorial function in medieval Ireland. By the 1680s, a man named Synnott had listed the chapel, though the historian Hore, writing in 1862, noted that the name of its dedication had already been lost. The surrounding enclosure, a grass-covered rectangle defined by a low earthen bank and a shallow outer fosse, is large enough to have served as a churchyard, and a smaller annexe adjoins it to the north-east, but the ground has yielded no evidence of graves. It is possible the enclosure had a different purpose entirely, or that any burials were confined to the vault and have left no surface trace. The connection to Tagunnan Castle suggests this was always a chapel for the household rather than the wider community, which may explain why so little accumulated around it over time.