Somewhere along its terrace stands No. 20, a house noted by the architectural historian Maurice Craig in his 1969 survey of Dublin's buildings, with references appearing on pages 108 and 324 of that volume. Craig's work remains one of the foundational texts for understanding the city's built environment, and even a brief mention in its pages signals that a structure was considered worth pausing over.

The date of the house at No. 20 is recorded as indeterminate, which is itself a small puzzle. For a street so thoroughly associated with the eighteenth and early nineteenth centuries, the absence of a firm construction date suggests either that the building has been significantly altered over time, that documentary evidence has not survived, or simply that the evidence available to Craig did not allow a confident attribution. Molesworth Street was developed largely during the Georgian period, when speculative builders and landowners were laying out much of what is now Dublin's south inner city in terraced brick, and a house here would most naturally belong to that era, though nothing in the record confirms it.

The street itself is easily reached on foot from St Stephen's Green or from Leinster House, the seat of the Irish parliament, which sits just around the corner on Kildare Street. No. 20 sits within a stretch that repays a slow walk rather than a glance from a passing bus; the variety in window proportions, doorcase details, and brick colour along the terrace tells something about the incremental way the street was filled in over decades. Craig's mention is spare, but for anyone working through the layers of the city's domestic architecture, it marks the address as one that was once considered significant enough to record.