Not a ceremonial well, not a holy well associated with a saint or a pattern day, but a working, water-bearing limestone well that sat undisturbed under the paving until road works brought it briefly to light. What made it quietly remarkable was not its presence alone, but what its construction revealed: three distinct building phases, each telling a slightly different story about how people in a medieval walled town kept themselves supplied with water across what may have been several centuries.

The well came to light on 31st August and 1st September 1999, when archaeologist John O'Connor, working under licence No. 99E0215 as part of monitoring for the Urban Renewal Scheme on Sarsfield Street, uncovered the top of a circular structure at a point designated CH155. It measured approximately 1.38 metres in diameter and was built from roughly hewn limestone blocks. When first exposed, only the top seven courses of stonework were visible; the well still held water, which had to be pumped out before eight further courses could be examined. The total recorded depth was 7.6 metres, though O'Connor noted it may have been deeper. The three building phases were legible in the stonework itself: the oldest courses were randomly laid with no obvious bonding material, the middle phase used regular coursing without mortar, and the uppermost four courses were neatly laid and mortar-bonded, suggesting a later repair or upgrade. Kilmallock was one of the more significant walled towns in medieval Munster, and a well of this kind would have served the densely settled streets within its walls. Once recorded, the well was covered with a wooden board and concrete was poured over it.

The well is no longer visible. It lies sealed beneath Sarsfield Street, its exact location known from the excavation record rather than any surface marker. For anyone walking through Kilmallock today, the interest lies partly in that invisibility: the medieval town's infrastructure persists underfoot, unannounced. The site is registered in the Archaeological Survey of Ireland under reference LI047-022---, and the excavation report by O'Connor forms part of the broader documentary record for this stretch of the Urban Renewal Scheme works.