The Pontifical Equestrian Order of St. Gregory the Great (Latin: Ordo Sancti Gregorii Magni; Italian: Ordine di San Gregorio Magno) was established on 1 September 1831, by Pope Gregory XVI, seven months after his election as Pope.

The end of the brief states that they must progressively maintain, by continued meritorious deed, the reputation and trust they had already inspired, and prove themselves worthy of the honor that had been conferred on them, by unswerving fidelity to God and to the sovereign Pontiff.

[3] The awarding of the Order of St. Gregory the Great presents no particular obligations on the recipients toward the Catholic Church – except for the general ones stated above.

An eight-pointed cross, the insignia of the order, bears a representation of St. Gregory on the obverse and on the reverse the motto Pro Deo et Principe ("For God and Ruler").

Finally, the costume contains suspenders, several yellow and red rosettes, white leather gloves, and a short sword with a handle made of mother of pearl with a medallion of the order at the end.