The village of Kill, sitting on low-lying ground in County Kildare beside its small northward-flowing river, looks like an ordinary Irish settlement. What lies beneath and behind the present streetscape, however, is a layered sequence of occupation stretching back well over a thousand years, most of it invisible to a passing eye. No surface trace survives of the early monastic foundation that scholars believe gave the place its origins, and the boundaries of whatever medieval borough eventually grew here have never been precisely established.

Kill is thought to have begun as an early Christian monastic site, though nothing of that phase remained visible above ground until 1993, when archaeological test-trenching revealed part of a probable ecclesiastical enclosure. The settlement was subsequently absorbed into the Anglo-Norman reorganisation of Leinster: the area formed part of the cantred of Offelan, the territorial unit nearest to Dublin, which Strongbow granted to Adam de Hereford in the early thirteenth century. Around that time, possibly slightly earlier, a motte was raised, the earthen mound that was the standard quick-build fortification of the Norman advance, possibly by John de Hereford. Charters from between 1215 and 1223 record Thomas de Hereford granting the church of Kill to St Thomas' Abbey in Dublin, with reference to his 'vill of Kill', a term indicating a small rural settlement with some legal and economic standing. St Thomas' Abbey may already have held a presence here before that grant: an earlier charter from 1206 to 1223 mentions a grange, a croft, a garden, and a haggard at Kill, though there is some suggestion these holdings may actually have been associated with Hartwell Castle, about a mile to the south. The first direct mention of a borough at Kill does not appear until 1608, when Richard Dowlin is named as provost of the town in a county-wide list. By 1629, a Thomas Hamlin held a castle, six messuages, and 120 acres here from the Earl of Kildare, and a census taken in 1659 recorded a population of 92. The main street of the present village is thought to preserve, in its general layout, a street pattern that had taken shape by the seventeenth century, an outline that survived even as the medieval settlement it once served quietly disappeared from the record.