But the corn-drying kiln uncovered at Ballydavid in County Tipperary represents a remarkably complete picture of how early communities processed grain, and it came to light only because a motorway was being built. During roadworks for the M8/N8 Cullahill to Cashel improvement scheme, archaeologists uncovered not one but several distinct periods of activity compressed into a single townland, each layer largely unaware of what lay beneath it.

The kiln itself, excavated and reported on by archaeologist Colum Hardy, sits in the north-eastern quadrant of a much older feature: a large sub-oval ditched enclosure of prehistoric date. A figure-of-eight kiln, as the name suggests, consists of two connected chambers, one serving as the flue and the other as the drying bowl where sheaves of grain were laid over a low fire to drive out moisture before milling or storage. This particular example measured 3.1 metres in length, 1.7 metres wide, and 1.1 metres deep, oriented along an east-west axis. Hardy concluded it was unlikely to be contemporary with the prehistoric enclosure in which it sits, placing it instead in the early medieval period, roughly the sixth to twelfth centuries, when such kilns were widespread across Ireland. Separately, the excavation also turned up the remains of a nineteenth-century cottage nearby, along with a series of furnace pits and deposits of charcoal and metallurgical waste pointing to small-scale metalworking on the same ground. Three distinct eras of human activity, prehistoric, early medieval, and post-medieval, each leaving its mark on the same patch of south Tipperary farmland, none of them visible from the surface before the diggers moved in.