That decision, practical and entirely unsentimental, is what makes this small enclosure in Mullagh, County Limerick, quietly worth noticing. The kiln was constructed directly against the outer face of the fort's inner bank, and the fosse, the defensive ditch that once ran between the two earthen banks encircling the site, was widened and deepened at the north-east specifically to accommodate it. The old and the utilitarian simply folded into one another.

The fort itself is a rath, the most common type of early medieval settlement monument in Ireland, typically consisting of a circular area enclosed by earthen banks and ditches that once protected a farmstead and its inhabitants. This particular example measures roughly 19 metres north to south and just over 20 metres east to west, enclosed by two concentric banks with a fosse about two metres wide between them. The inner bank survives best at the south-east, where it still stands to an external height of 1.3 metres, while the outer bank is largely levelled on its eastern and south-western arc, preserved only on the north-west to north-north-east section. A dry-stone field wall runs tangentially along the southern edge of the inner bank, and the interior, still under pasture, rises gently toward the centre. The site sits on an east-facing slope in an area of outcropping limestone, which explains the kiln: lime kilns were used to burn limestone and produce quicklime for agricultural use, and the raw material was quite literally underfoot.

The site lies in open pasture, so access depends on the usual courtesies of farming land. The earthworks are subtle rather than dramatic, and the most rewarding approach is a slow one, reading the landscape rather than expecting obvious visual impact. The north-east quadrant is the place to linger, where the relationship between the deepened fosse and the kiln structure is most legible. The inner bank at the south-east, the best-preserved stretch, gives the clearest sense of the original scale of the enclosure.