The idea that Liturgy rests upon papal diktat, and upon the personal fads of each passing pontiff, is not just rubbish; it is poisonous rubbish.
Cardinal Ratzinger listed Jerusalem, Antioch, Rome, Alexandria, and Constantinople. And he pointed out that 'Rites' "are forms of the apostolic Tradition and of its unfolding in the great places of the Tradition". The great Apostolic liturgical traditions are part of the Apostolic datum; the Depositum fidei; the Tradition which comes through the Apostles; they sit beside the Canon of Scripture, the Creeds, and the Ministry. The Lex orandi which takes pride of place over the Lex credendi ranks beside ... perhaps even above ... the doctrinal Decrees of the great, dogmatic, Ecumenical Councils. It lies far beyond the whimsies, prejudices, and personal antipathies of each pope.
In concluding this four-part survey, I remind readers that we have met no examples of liturgically-preoccupied popes hunched over desks in Rome, micromanaging what every insignificant curate anywhere in the World can be allowed to do at the Altar.
We have met no pope who believed that doctrinal unity could only be secured or expressed by rigid uniformity of worship.
But there is an even broader point to be made than the merely liturgical question: the 'papacy' which at this moment we are so painfully enduring is a Novelty; it is not found in Antiquity and no more is it found in the admirable teaching of Vatican I (or the subsequent clarifications by Blessed Pius IX) nor in the texts of Vatican II. In the sometimes-derided high baroque period of the Roman Primacy, the writings of that admirable pontiff, Prospero Lambertini, Benedict XIV, give no countenance to it.
It is because this style of papacy is a Novelty that it needs to be unambiguously rejected.
Catholicism with Novelty is not Catholicism with something exotic added. One you embark upon nailing alien matter onto the Faith, what you get is not Catholicism-plus. Catholicism, with the authentic Papal Ministry subtracted from it, has ceased to be Catholicism at all.
The authentic Petrine Ministry is neatly exemplified by Sixtus III (Pope 432--441) "Let nothing further be permitted to Novitas because it is appropriate that nothing be added to Vetustas; let the transparent Faith and Belief of our forebears be disturbed by no admixture of filth." And by Pope Caelestine (422-432) "Let Novitas cease to attack Vetustas." Pope Honorius I, the First Heretic Pope, was condemned by an Ecumenical Council and his own Successors in the See of S Peter for heresy by being listed among the "novi erroris inventores". More about him later.
WE WANT OUR PAPACY BACK!
WHERE HAVE THEY HIDDEN PETER?