Blazon

The left field is blue with a silver fleur-de-lis; the right is white, with a flaming heart pieced by an arrow, entirely red, and resting on an uncovered book.

Above the shield there is a silver mitre, adorned with three gold bands joined by a gold vertical post, with fluttering red infulae, fringed with gold and adorned with gold crosses; in front of the infulae there are the crossed Petrine keys, gold (bend) and silver (bend sinister), linked by a red cord.

Motto

IN ILLO UNO UNUM

Explanation

The coat of arms of the Holy Father Leo XIV

On the left field of the coat of arms of the Holy Father Leo XIV, the blue background recalls the heights of the heavens and is characterized by its Marian significance, a classic symbol referring to the Blessed Virgin Mary, the lily or fleur-de-lis (flos florum).

In the other field, white in colour, there is the emblem of the Augustinian Order, a flaming heart pieced by an arrow. This image symbolically represents the words of Saint Augustine in the book of Confessions: “Sagittaveras tu cor meum charitate tua” (“You have wounded my heart with your love”). It is an element that has always been present in the emblem of the Augustinians from the sixteenth century onwards, albeit with several variations, such as the presence of the book symbolizing the Word of God capable of transforming the heart of every man, as it was for Augustine. The book also recalls the enlightened works that the Doctor of Grace gave to the Church and humanity. White (in an ivory shade in the papal coat of arms) is a recurrent colour in other coats of arms of religious orders, and can be read as a symbol of holiness and purity.

The motto, “In Illo uno unum” (“In the one Christ we are one”), recalls the words of Saint Augustine in a sermon, the Exposition on Psalm 128, explaining that “in the one Christ we are one”, “one in the One Christ”.

don Antonio Pompili
Vice President of the Italian Heraldic Genealogical Institute