Within the grounds of what is now Donadea Forest Park in County Kildare, a graveyard holds several centuries of overlapping religious history in a relatively small space. At its centre are the ivy-clad remains of a seventeenth-century church, built on a site that may have hosted Christian worship since the Early Christian period. What survives is fragmentary: the east gable of the chancel, the lower courses of the north wall, and the partial remains of what appears to be a later side chapel abutting the chancel to the south. That chapel, nearly square in plan and built of rubble masonry, retains a tall lancet window in its south wall and a partially robbed ope, an opening, in its east wall. The whole structure is heavily overgrown, which adds atmosphere but obscures detail.

The church dates to 1626, a date recorded on an inscribed plaque forming part of the Aylmer tomb inside the adjacent nineteenth-century Church of Ireland building that now occupies the same graveyard. The Aylmers were the dominant family in this demesne for centuries, and their presence is felt throughout the site. That later church houses their effigial tomb, a carved monument bearing recumbent figures of the deceased, as well as an octagonal font; a second font lies outside the church nearby. The site formerly hosted a patron, a local annual gathering combining religious observance and community festivity, held on the 29th of June, the feast of St Peter. About a hundred metres to the south stands Donadea Castle, a structure that evolved from a tower house into a fortified house and eventually a mansion, tracing the Aylmer family's changing fortunes and architectural ambitions across the same period.

The site sits within Donadea Forest Park, which is publicly accessible. The ruins, the graveyard, and the later church are clustered together, so the different layers of the site are easy to read in relation to one another, even if the older fabric requires some patience to interpret through the ivy and the accumulated centuries.