Measuring just over a metre in length and roughly seventy centimetres wide, it is easy to overlook in a building full of architectural and historical layers, yet it quietly records something specific: the arms of a particular Gaelic family, carved and placed at a moment of considerable turbulence in Irish history.

The inscription reads "His Vinces" above a heraldic crest featuring a detailed image of a ship, followed by "Armas Cloinne Domhnaill", meaning the arms of Clann Domhnaill, and the year 1646. "His Vinces", a Latin phrase meaning "with this you will conquer", carries an unmistakably martial and perhaps religious charge, echoing the tradition of the Chi-Rho vision attributed to the Emperor Constantine. The Clann Domhnaill were a significant Gaelic dynasty, and 1646 places this monument in the middle of the Confederate Ireland period, when Gaelic Catholic lords were attempting to assert political and military authority across the island. The choice to carve family arms in Irish, in Latin, in a friary chapel, at that particular moment, speaks to the intertwining of Gaelic identity, Catholic faith, and dynastic ambition that defined the era.

The monument sits within Ross Errilly Friary, one of the better-preserved Franciscan houses in Ireland, whose ruins stand near the Black River in east County Galway. The chapel where the monument is located lies to the east of the double transept, off the main nave, and the stone is best viewed from the south.