No plaque, no outline in the paving, no surviving wall. Yet somewhere beneath or behind the present streetscape stood a guildhall that once organised a significant slice of the city's working life, and that was prominent enough to rename the market that grew up beside it.

The building was known as Carpenter's Hall, the meeting place of the guild of carpenters, millers, heylers, and tilers. Guilds were formal trade associations that regulated entry into a craft, set standards, and looked after their members. This particular guild was incorporated in 1507 under a charter granted by Henry VII, a moment of official recognition that placed these trades within the legal framework of the city. At some point the building acquired a second name, the New Hall, and the market immediately adjacent became known as New Hall Market, a neat reminder of how thoroughly commercial life in medieval and early modern Dublin was organised around such institutional anchors. The guildhall's location in Cornmarket placed it in one of the busiest commercial districts of the old city, an area long associated with grain trading and the movement of goods in and out of the Hiberno-Norse and later Anglo-Norman town.

For anyone curious enough to look, Cornmarket survives as a street name in the Liberties, close to the junction with High Street and Thomas Street. The general area still carries faint traces of its medieval layout, though Keyzar's Lane itself has not survived in any obvious form on the modern map. The site of Carpenter's Hall has left no visible surface remains, as the record compiled by Geraldine Stout confirms, so this is a place best approached with a map, a reasonable tolerance for absence, and an interest in what cities quietly swallow over five centuries.