The one recorded at Finnure in County Galway is typical in that regard: a structure whose original purpose was entirely practical, built to burn limestone at high temperatures and produce quicklime for spreading on acidic fields or for use in mortar. The process, which required sustained heat over many hours, left behind a characteristic bowl-shaped stone structure, usually set into a hillside to allow fuel to be loaded from above and the finished lime to be raked out from a draw hole at the base.

Lime kilns became widespread in Ireland from the late eighteenth century onward, as improving landlords and tenant farmers alike came to understand that liming could transform boggy, acidic ground into productive farmland. In the west of Ireland, where soils are often thin and acidic and limestone is locally abundant, small kilns like this one were a common feature of the agricultural landscape. They were typically built and used by local communities, fired with turf or coal, and operated seasonally. Many fell out of use in the late nineteenth or early twentieth century as commercially produced lime became more accessible.