That is more or less the entirety of what survives in documentation: a mention, a date, and the strong implication that a water infrastructure feature of some kind occupied this part of the city in the early seventeenth century, its exact position now lost to subsequent centuries of building, rebuilding, and urban accumulation.

The reference comes from Clarke (2002), who notes the former existence of a cistern here in 1605. A cistern in this context would have functioned as a reservoir or collection tank, gathering water for distribution to nearby households or institutions, and would have been a meaningful piece of civic infrastructure at a time when Dublin was expanding its administrative and physical footprint under English rule. The early 1600s were a period of considerable reorganisation in the city, and the management of water supply was a persistent practical concern. Beyond that single citation, however, the record goes quiet. Clarke does not precisely locate the feature, and no corroborating survey or map reference appears to fix it to a particular street or plot.

This is, in the most literal sense, a place that cannot currently be visited, because it cannot currently be found. Its interest lies precisely in that gap between the certainty of the historical mention and the absence of any physical or cartographic trace. For anyone with an interest in the infrastructure of early modern Dublin, the Clarke volume itself is the closest point of access. What the cistern looked like, how it was fed, who maintained it, and when it fell out of use are questions the surviving record does not answer.