On the left side of the shield, a blue background displays a silver fleur-de-lis. The right side features a white field containing a red flaming heart, pierced by an arrow, positioned atop an open, unbound book.
Crowning the shield is a silver mitre embellished with three horizontal gold bands connected by a vertical gold strip. Flowing red lappets edged in gold and marked with gold crosses extend from the back. Positioned in front of these are two crossed keys—one gold (diagonal from top left to bottom right) and one silver (diagonal from top right to bottom left)—tied together with a red cord.
The left section of the coat of arms features a blue field, evoking the celestial realm and bearing traditional Marian symbolism. At its center stands a silver fleur-de-lis—also known as the “flower of flowers”—a time-honored emblem of the Blessed Virgin Mary.
The right field, set against an ivory-toned white, bears the emblem associated with the Augustinian Order: a red flaming heart pierced by an arrow. This powerful symbol echoes the words of Saint Augustine in his Confessions: “You pierced my heart with your love.” Since the sixteenth century, this heart has been a consistent element in Augustinian imagery, though often accompanied by other features such as an open book—signifying both the transformative power of Scripture and the theological legacy of Saint Augustine, known as the Doctor of Grace. The white background, commonly seen in the heraldry of various religious orders, represents sanctity and spiritual purity.
Beneath the shield appears the papal motto: “In Illo uno unum” (“In the One Christ, we are one”), drawn from a homily by Saint Augustine on Psalm 128. This phrase speaks to the profound unity believers share in Christ—“one in the One.”
IN ILLO UNO UNUM (“In the One Christ, we are one”)
