Not ruined, not demolished with records intact, simply unknown in its precise location, a hall with a tower, a chamber, an upper room, and further ancillary buildings, surviving only in a handful of historical references and the faint cartographic shorthand of a four-hundred-year-old map.

The building was known as Thomas Court, and its origins lie in the dissolution of the monasteries under Henry VIII. St. Thomas Abbey, a medieval Augustinian foundation in the Liberties area of Dublin, was suppressed in 1539, and the property that followed from that upheaval included this residence, which historian Clarke identifies as already associated with the former abbey site by that same year. The description Clarke offers, recorded in a 2002 publication, suggests a structure of some consequence: the combination of hall, tower, and chamber points to a building of mixed domestic and defensive character, typical of transitional architecture in the decades immediately following the Reformation, when ecclesiastical properties across Ireland were being adapted, parcelled out, and rebuilt by new occupants. The residence also appears on John Speed's map of Dublin, published in 1610, which is among the earliest detailed cartographic records of the city and gives the building at least a visual foothold in the historical record, even if the mark on Speed's map cannot now be precisely reconciled with any surviving structure or plot boundary.

There is, in practical terms, nothing to visit. The exact location of Thomas Court remains unestablished, and no physical trace has been identified. What the site offers instead is a different kind of engagement: walking the streets of the Liberties or the area around Thomas Street, a visitor is moving through ground where this building almost certainly stood, somewhere within reach but unreachable. Speed's 1610 map of Dublin is held in various library and archive collections and is widely reproduced online; comparing it against a modern street plan of the area gives some sense of how radically the urban fabric has shifted across the intervening centuries, and how much a single unlocated building can quietly represent about what the city has lost and forgotten.