The panel originated at St Mary's, the town's medieval parish church, and at some point made the short journey of roughly 190 metres to its current home, where it has been set into the porch on the western side of the building.

The movement of carved stonework from medieval churches into later Catholic buildings was not unusual in Ireland, particularly during the nineteenth century, when new church construction gave communities an opportunity to rescue and incorporate earlier carved fragments that might otherwise have been lost to weathering or neglect. St Mary's, Callan, is a substantial medieval structure, and the survival of figurative carving from such a building is genuinely notable. Depictions of the Holy Trinity in carved stone panels follow a tradition found across late medieval European ecclesiastical art, typically representing the Father, Son, and Holy Spirit in symbolic or figurative form, though the precise iconography of this particular panel is not fully documented in what has been recorded about it.