What makes this particular wall worth a second glance is a large blocked-up rectangular window, roughly 1.45 metres wide and 3.4 metres high, framed by undressed stonework. It is an oddly imposing feature for a site that has otherwise been absorbed into the surrounding streetscape, and it may be the last standing fragment of a Catholic chapel that once served the town.

A commemorative plaque on Chapel Lane records a construction date of 1783, a period when Catholic worship in Ireland was still operating under the lingering shadow of the Penal Laws, the series of statutes that had, through most of the eighteenth century, placed severe restrictions on Catholic religious practice, property, and public life. Churches built in this era were often modest, deliberately unassuming structures, which makes the scale of that blocked window all the more suggestive. The chapel appears on the first edition of the Ordnance Survey six-inch map, where it is labelled simply "Old R.C. Chapel", indicating it had already passed out of active use by the time the survey was carried out in the mid-nineteenth century. What replaced it, and when the building fell into ruin, is not recorded at the site itself.