Not a grand architectural survival, not a romantic ruin, but a functional convenience that served the people of sixteenth-century Dublin and then disappeared so thoroughly that its precise location has never been pinned down. It is the kind of detail that falls through the cracks of history, surviving only as a single line in a scholarly footnote, and yet it tells us something quietly significant about how urban life was organised in early modern Ireland.

The latrine was associated with Fyans Castle, a structure built in 1571, according to Howard Clarke's 2002 study of Dublin's urban fabric. The castle itself belonged to a period when Dublin's south city was still developing its street patterns and institutional buildings, and private or semi-public structures routinely incorporated sanitary provision in ways that later centuries would forget or demolish without record. A latrine attached to or adjoining a castle was not unusual for the period; such facilities were often built into the thickness of a wall, corbelled out over a ditch or waterway, or positioned in a yard or bawn. A bawn, broadly speaking, was an enclosed courtyard or defensive enclosure attached to a tower house or fortified building, and the eastern side of Fyans Castle would likely have been within or immediately adjacent to such a space. The fact that this latrine was described as public, or at least semi-public in function, hints at the castle's role within its immediate neighbourhood rather than as a purely private residence.

There is, in practical terms, nothing here to visit. The site is not precisely located, Clarke notes, and Fyans Castle itself is long gone, absorbed into centuries of Dublin's rebuilding and expansion south of the Liffey. What remains is the historical curiosity of the record itself, a reminder that even the most overlooked aspects of urban infrastructure, sanitation, waste, the unglamorous logistics of daily life, were present and functioning in Tudor Dublin. Anyone with an interest in the archaeology of the city might find it worth consulting Clarke's 2002 work for the broader context of what the south city looked like in the late sixteenth century, even if this particular corner of it can only be imagined.