Not a decorative feature or a civic monument, but a functional source of water that served the medieval town and was considered significant enough to be mapped and recorded centuries after it fell out of use. Today the site is absorbed entirely into the busy streetscape of one of Dublin's oldest thoroughfares, with no visible trace remaining.

The well's existence is known primarily through two sources. It appears on the Friends of Medieval Dublin map, produced in 1978 as part of a broader effort to document the physical remains and recorded features of the city's medieval core. It was also noted by Bradley and King in 1987, catalogued as entry number 96 in their survey. Castle Street itself runs roughly east to west close to the site of Dublin Castle, in an area that formed part of the earliest settled and fortified zones of the Norse and later Anglo-Norman town. Wells in medieval urban settings were not incidental features; they were essential infrastructure, often associated with specific streets, parishes, or institutional buildings, and their locations could shape the development of the surrounding area. The proximity of this one to the castle end of the street suggests it may have served a dense and busy part of the medieval city.

There is nothing to see at the site today in any conventional sense. Castle Street is a working city street, and the western end near its junction with Werburgh Street and Christchurch Place sees constant foot traffic. For anyone with an interest in the layers beneath Dublin's modern surface, the value here is more conceptual than visual. The Friends of Medieval Dublin map, though produced decades ago, remains a useful reference for orienting oneself to features like this one, and the Bradley and King survey provides the scholarly grounding. Walking the street with that context in mind, it is possible to think about what the ground underfoot once held, even when the city above has moved on entirely.