That the collection is Roman is obvious. It is full of local allusions to Rome. For instance, one of the collects to be said by a bishop on the anniversary of his consecration could only be used by the pope of Rome: "Lord God ... who, although Thou dost not cease to enrich with many gifts Thy Church spread throughout the world, nevertheless dost look more favourably upon the see of Thy blessed Apostle Peter, as Thou hast desired that it should be most exalted, etc." The Preface for St John and St Paul remembers that they are buried within "the boundaries of this city"; the Masses of the Patrons of Rome, St Peter and St Paul, continually allude to the city.