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Corpus Christi Watershed

Pope Saint Paul VI (3 April 1969): “Although the text of the Roman Gradual—at least that which concerns the singing—has not been changed, the Entrance antiphons and Communions antiphons have been revised for Masses without singing.”

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Views from the Choir Loft

Dr. Peter Kwasniewski

A graduate of Thomas Aquinas College (B.A. in Liberal Arts) and The Catholic University of America (M.A. and Ph.D. in Philosophy), Dr. Peter Kwasniewski is currently Professor at Wyoming Catholic College. He is also a published and performed composer, especially of sacred music. Read more.

Dr. Peter Kwasniewski · December 18, 2014

A Fond Farewell

Changes in my personal life have made it necessary for me to curtail my blogging activity, and so this blog will be my last—at least for a time.

Dr. Peter Kwasniewski · December 11, 2014

The Importance of Singing Carols

Let us make a point of singing good carols as much as we can throughout the whole Christmas season, rather than imitating a world that stops celebrating on December 26th.

Dr. Peter Kwasniewski · December 4, 2014

Resurgent in the Midst of Crisis

A new book for those who are struggling to understand what has happened to the noble liturgy of the Roman Catholic Church and how we might find our way out of this crisis.

Dr. Peter Kwasniewski · November 27, 2014

Advent Meditation

As we turn the corner to Advent, we might draw some inspiration from Pope Emeritus Benedict XVI.

Dr. Peter Kwasniewski · November 20, 2014

Why Are the Readings Not Sung at Mass?

The ancient and beautiful practice of chanting readings at Mass has largely disappeared in the Ordinary Form. What happened?

Dr. Peter Kwasniewski · November 13, 2014

Difference between the Two Priesthoods

What exactly is the difference between the universal priesthood of the baptized and the ministerial priesthood of the ordained?

Dr. Peter Kwasniewski · November 6, 2014

How Liberalism Undermines Itself

Freedom for all sounds nice in theory, but how does it work in practice?

Dr. Peter Kwasniewski · October 30, 2014

Music Never Lies

Every piece of music, great or small, contains an indefinable message of the soul, penetrating, communicative, formative.

Dr. Peter Kwasniewski · October 23, 2014

The Use and Abuse of the “Via Media”

Everyone likes to think themselves at the golden mean between two extremes. The problem is, this often becomes a substitute for real thinking, and prevents us from striving for the best.

Dr. Peter Kwasniewski · October 16, 2014

In Defense of the Organ Postlude

Is the organ postlude after Mass a loud distraction that stands in the way of making one’s thanksgiving? Or is it a wholly fitting conclusion to an act of public divine worship?

Dr. Peter Kwasniewski · October 9, 2014

Death and Rebirth of Monastic Life

The death of the monastic life after the Second Vatican Council was the most devastating blow the Church received, and renewal will come from its rebirth.

Dr. Peter Kwasniewski · October 2, 2014

Lumen Gentium on Summorum Pontificum

‘Lumen Gentium’ was given to us fifty years ago, but its provisions still apply—and they are relevant to the availability of the Extraordinary Form.

Dr. Peter Kwasniewski · September 25, 2014

Confusions about Inculturation

A false notion of inculturation has allowed for a vast profanation and paganization of Catholic life and worship.

Dr. Peter Kwasniewski · September 18, 2014

Have We Lost Our Sensitivity to Music?

Educated people in the 19th century feared the influence of opera on moral character. We seem to have lost any sense of music’s power to corrupt us.

Dr. Peter Kwasniewski · September 11, 2014

Breaking News: The Communion Hymn is an Optional Add-On

Reading the General Instruction of the Roman Missal can bring many surprises. One of them has to do with the ubiquitous communion hymn.

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Corpus Christi Watershed

President’s Corner

    PDF Download • “Ubi Caritas” (SATB)
    I remember singing “Ubi Cáritas” by Maurice Duruflé at the conservatory. I was deeply moved by it. However, some feel Duruflé’s version isn’t suitable for small choirs since it’s written for 6 voices and the bass tessitura is quite low. That’s why I was absolutely thrilled to discover this “Ubi cáritas” (SATB) for smaller choirs by Énemond Moreau, who studied with OSCAR DEPUYDT (d. 1925), an orphan who became a towering figure of Catholic music. Depuydt’s students include: Flor Peeters (d. 1986); Monsignor Jules Van Nuffel (d. 1953); Arthur Meulemans (d. 1966); Monsignor Jules Vyverman (d. 1989); and Gustaaf Nees (d. 1965). Rehearsal videos for each individual voice await you at #19705. When I came across the astonishing English translation for “Ubi Cáritas” by Monsignor Ronald Knox—matching the Latin’s meter—I decided to add those lyrics as an option (for churches which have banned Latin). My wife and I made this recording to give you some idea how it sounds.
    —Jeff Ostrowski
    PDF • “Cantus Mariales” (192 pages)
    Andrea Leal has posted an absolutely pristine scan of CANTUS MARIALES (192 pages) which can be downloaded as a PDF file. To access this treasure, navigate to the frabjous article Andrea posted Monday. The file is being offered completely free of charge. The beginning pages of the book have something not to be missed: viz. a letter from Pope Saint Pius X to Dom Pothier, in which the pope calls Abbat Pothier “a man versed above all others in the science of liturgy, and to whom the cause of Gregorian chant is greatly indebted.”
    —Jeff Ostrowski
    Music List • (2nd Sunday of Lent)
    Readers have expressed interest in seeing the ORDER OF MUSIC I created for this coming Sunday, which is the 2nd Sunday of Lent (1 March 2026). If such a thing interests you, feel free to download it as a PDF file. This feast has magnificent propers. Its somber INTROIT is particularly striking—using a haunting tonality—but the COMMUNION with its fauxbourdon verses is also quite remarkable. I encourage all the readers to visit the feasts website, where the Propria Missae may be downloaded completely free of charge.
    —Jeff Ostrowski

Quick Thoughts

    Extreme Unction
    Those who search Google for “CCCC MS 079” will discover high resolution images of a medieval Pontificale (“Cambridge, Corpus Christi College, MS 079”). One of the pages contains this absolutely gorgeous depiction of the Sacrament of Extreme Unction.
    —Corpus Christi Watershed
    PDF Chart • “Plainsong Rhythm”
    I will go to my grave without understanding the lack of curiosity so many people have about the rhythmic modifications made by Dom André Mocquereau. For example, how can someone examine this single sheet comparison chart and at a minimum not be curious about the differences? Dom Mocquereau basically creates a LONG-SHORT LONG-SHORT rhythmic pattern—in spite of enormous and overwhelming manuscript evidence to the contrary. That’s why some scholars referred to his method as “Neo-Mensuralist” or “Neo-Mensuralism.”
    —Jeff Ostrowski
    PDF • “O Come All Ye Faithful” (Simplified)
    I admire the harmonization of “Adeste Fideles” by David Willcocks (d. 2015), who served as director of the Royal College of Music (London, England). In 2025, I was challenged to create a simplified arrangement for organists incapable of playing the authentic version at tempo. The result was this simplified keyboard arrangement (PDF download) based on the David Willcocks version of “O Come All Ye Faithful.” Feel free to play through it and let me know what you think.
    —Jeff Ostrowski

Random Quote

Nothing should be allowed that is unworthy of divine worship, nothing that is obviously profane or unfit to express the inner, sacred power of prayer. Nothing odd or unusual is allowable, since such things, far from fostering devotion in the praying community, rather shock and upset it—and impede the proper and rightful cultivation of a devotion faithful to tradition.

— Pope Paul VI • 10/13/1966

Recent Posts

  • PDF Download • “Ubi Caritas” (SATB)
  • PDF • “Cantus Mariales” (192 pages)
  • PDF Download • Fourteen (14) Versions of the Splendid Hymn: “Salve Mater Misericordiae”
  • Fulton J. Sheen • “24-Hour Catechism”
  • Music List • (2nd Sunday of Lent)

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