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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 · May 22, 2014

Three Categories of Liturgical Problem

We need to know the different kinds of problems there are, and who in the Church is qualified or required to fix them.

Dr. Peter Kwasniewski · May 15, 2014

Dogma as the Servant of Mystery

Dogmatic statements liberate the Christian intellect by establishing it in the truth.

Dr. Peter Kwasniewski · May 8, 2014

Sacred Choral Works CDs Available

These 3 full-length compact discs feature recordings of nearly every score in the 273-page book.

Dr. Peter Kwasniewski · May 1, 2014

A Triple Cord: Liturgy, Aquinas, and CST

The traditional liturgy, the study of St. Thomas Aquinas, and Catholic social doctrine―these three things stand or fall together.

Dr. Peter Kwasniewski · April 24, 2014

“Soft Source of Calm Tranquillity”: The Quiet Mass

A poem set to music by Handel perfectly captures the feelings one has at a quiet low Mass. Here I try to say why this form of the Mass is so special and valuable.

Dr. Peter Kwasniewski · April 17, 2014

Sheed on the Missal of 1968

Frank Sheed is one of my favorite Catholic authors, but when it came time for him to grapple with the liturgical revolution, either his perspicuity or his nerve failed him.

Dr. Peter Kwasniewski · April 10, 2014

Music Beautiful by Nature

The “beautiful” is largely distinguished by the degree to which the beautiful “thing” is in accord with nature.

Dr. Peter Kwasniewski · April 3, 2014

Why We Need the Greatest Art in Catholic Worship

Was it necessary to change our forms of worship to suit “modern man”? And do we need to set aside our glorious musical heritage? Absolutely not.

Dr. Peter Kwasniewski · March 27, 2014

Why Do We Kneel in Church?

Kneeling is a sign that both signifies and helps produce in the soul the disposition of humility before the great King over all the earth.

Dr. Peter Kwasniewski · March 20, 2014

Catholic Identity Crisis: Who Are We? What Do We Believe? How Should We Live?

Eastern Catholics and Christians have maintained the depth, beauty, and sacredness of their liturgical heritage. How does the institutional failure of Roman Catholics to preserve their own heritage affect their ability to evangelize, or even to live a fully Catholic life?

Dr. Peter Kwasniewski · March 13, 2014

The Eternal, Not the Contemporary

Arvo Pärt speaks words of wisdom about why the music of some composers never gets old and why old texts are always young.

Dr. Peter Kwasniewski · March 6, 2014

Seven Theses for the Evaluation of Music

Let us listen consistently to the greatest works in music and make them the exemplars, the teachers, the inspirations and consolations of our interior life as aesthetic beings.

Dr. Peter Kwasniewski · February 27, 2014

Beethoven’s “Missa Solemnis” and the Five Ways of St. Thomas

An imaginative or imaginary (you decide) correlation between the five movements of the greatest proto-Romantic sacred work and the five greatest proofs for the existence of God.

Dr. Peter Kwasniewski · February 20, 2014

Seeking Inspiration in the Renaissance

Just as those who are passionate about sacred music find great inspiration in the Renaissance, so today we can look around at a new rebirth of Catholic tradition and find hope for a renewal of Catholic culture.

Dr. Peter Kwasniewski · February 13, 2014

Why Focus So Much on the Liturgy?

Sometimes people wonder why traditional Catholics make such a big deal of the liturgy. Do they really think it’s the most important thing in the world? As a matter of fact, they do―because it is.

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Corpus Christi Watershed

President’s Corner

    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
    Like! Like! Like!
    You won’t believe who recently gave us a “like” on the Corpus Christi Watershed FACEBOOK PAGE. Click here (PDF) to see who it was. We were not only sincerely honored, we were utterly flabbergasted. This was truly a resounding endorsement and unmistakable stamp of approval.
    —Jeff Ostrowski
    Which Mass?
    In 1905, when the Vatican Commission on Gregorian Chant began publishing the EDITIO VATICANA—still the Church’s official edition— they assigned different Masses to different types of feasts. However, they were careful to add a note (which began with the words “Qualislibet cantus hujus Ordinarii…”) making clear “chants from one Mass may be used together with those from others.” Sadly, I sometimes worked for TLM priests who weren’t fluent in Latin. As a result, they stubbornly insisted Mass settings were ‘assigned’ to different feasts and seasons (which is false). To understand the great variety, one should examine the 1904 KYRIALE of Dr. Peter Wagner. One should also look through Dom Mocquereau’s Liber Usualis (1904), in which the Masses are all mixed up. For instance, Gloria II in his book ended up being moved to the ‘ad libitum’ appendix in the EDITIO VATICANA.
    —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

“Finally, let us not forget that listening especially is active participation. When we listen to the performances of Bach’s Saint Matthew Passion, we can fully participate actively in the Passion of Christ. And so, if we listen attentively to the singing and organ music during the celebration of the divine services, our participation is not less complete. The real significance of this objective and very important aspect is insufficiently understood.”

— Flor Peeters

Recent Posts

  • Music List • (2nd Sunday of Lent)
  • PDF Download • “Funerals in the Ordinary Form”
  • Extreme Unction
  • Like! Like! Like!
  • Which Mass?

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