Built into an earthen bank on the south side of one of Ireland's most melancholy unfinished buildings, a small limekiln sits quietly as a footnote to a much larger architectural catastrophe. A limekiln is essentially a furnace in which limestone is burned at high temperature to produce quicklime, a material used widely in construction for mortar and plaster. This one was not a standalone industrial feature but was incorporated into an upcast bank, a raised terrace of deposited earth that overlooked a large sunken garden. Its purpose, as far as can be determined, was functional and immediate: to supply the lime required for the internal plasterwork of the building it served.

The building in question is Jigginstown House, a vast, roofless ruin of brick near Naas in County Kildare. Construction began in the 1630s, commissioned as a residence fit for the Lord Deputy of Ireland, Thomas Wentworth, later Earl of Strafford. It was never completed. Wentworth was attainted and executed in 1641, and the building was abandoned mid-construction, leaving what would have been one of the largest secular structures in seventeenth-century Ireland as an empty shell. The limekiln came to light during conservation work and associated archaeological excavation carried out in the early 2000s. The earthen bank into which it was built provided a terrace on the south side of the house, and the kiln within it points to active on-site production of building materials, suggesting that at some point work was progressing with enough momentum to warrant making lime locally rather than sourcing it elsewhere. Whether that production ceased when Wentworth fell, or had already wound down before his arrest, is not recorded.