At Seafield in County Wexford, a D-shaped burial enclosure sits on flat ground roughly a kilometre from the coast, its boundaries formed by an earthen bank rather than stone wall. The enclosure measures approximately 58 metres north to south and 54 metres east to west, a substantial area, yet within it there is no visible trace of the church that almost certainly once stood here.

In Irish ecclesiastical landscapes, a graveyard of this form almost always began as a church site. The D-shaped or oval enclosure, defined by a curving bank, is a characteristic signature of early medieval religious foundations, and the shape itself is often considered older than the rectangular walled graveyards associated with later parish organisation. Churches built of timber, or even of modest stone, can vanish almost entirely over centuries of agricultural use, stone robbing, and simple neglect, leaving the enclosure as the only legible evidence that something more than a field once occupied the ground. Here, the earthen bank survives to mark that boundary, even as everything inside it that might explain the site's origins has gone below the surface or disappeared altogether.

The site sits in level, open country close to the Wexford coast, a landscape where the absence of obvious topographical drama makes surviving earthworks all the more worth pausing over. The enclosing bank is the thing to look for, tracing that distinctive curved outline across otherwise unremarkable ground.