Pope John XXII -- Vicarius Filii DEI
The following is from a page of The Sabbath Privilege Edict of 1718, put forth by Pope John XXII, in which he confirmed that he received a vision from the Virigin Mary, in which she instructed that the wearers of the Scapular of Our Lady of Mount Carmel will be delivered out of Purgatory on the first Saturday after their death. The title "Vicarius Filii DEI" (Vicar of the Son of God) as a reference to the Pope, can be clearly seen in the third line of this title.
The Sabbath (Saturday) Privilege Edict
What the Most Pious and Devout Carmelite Mother of God requested from
Heaven, the Vicar of the Son of God ratified and promulgated on Earth
John XXII in a long celebrated bull, called Sabbitina, beginning Sacratissimo uti culmine &c.
Papal Confirmation Adds Weight