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Corpus Christi Watershed

We’re a 501(c)3 public charity established in 2006. We have no endowment, no major donors, no savings, and run no advertisements. We exist solely by the generosity of small donors.

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Views from the Choir Loft

Gregorian Semiology

Jeff Ostrowski · May 5, 2025

“Basic Catechism of Gregorian Chant” • Fifteen Questions Answered

“Kids, you’re only on this floating rock for a very short time.”

Jeff Ostrowski · March 29, 2025

PDF Download • “Gloria III” Organ Accompaniment

This is surely one of music history’s great ironies!

Jeff Ostrowski · November 26, 2024

PDF Download • “Entrance Chant” for the Feast of the Immaculate Conception (8 December)

What is he talking about? Where can I go to hear these “aesthetically superior” interpretations? Where can they be found?

Jeff Ostrowski · February 10, 2024

Must We “Love” All Gregorian Chant?

Where “Parce Dómine” (the famous song for Lent) came from.

Jeff Ostrowski · December 1, 2023

My Response to Dr. Weaver’s Latest Article

Is it fair to forever bind Dom Guéranger to what he wrote about “barbarous archaisms” in 1855?

Jeff Ostrowski · November 4, 2023

PDF • Draft Booklet “Couture Chant” (255 Pages)

This is very much a “work in progress”…

Patrick Williams · October 2, 2023

Vollaerts Revisited

“The time is ripe to reconsider the contributions of Fr. Jan Vollaerts to Gregorian musicology.” —Patrick Williams

Jeff Ostrowski · July 19, 2023

Gregorian Rhythm Wars • “Jeff’s Fourth Response to Patrick” (19 July 2023)

Twenty years ago, I had the opportunity to conduct a week-long interview with Dom Cardine’s former boss.

Jeff Ostrowski · March 15, 2023

“Solesmes Ictus” • Can It Be Justified? (Examples)

“If you begin by telling a man that in a word like 𝐷𝑒𝑢𝑠 the first syllable corresponds to the weak beat, the second to the strong beat of a modern bar, the only thing accomplished will be to bewilder him thoroughly.” —Father Bewerunge

Jeff Ostrowski · November 1, 2022

“Gregorian Chant Rhythm Wars” • Ostrowski Vs. Williams

My colleague, Patrick Williams has agreed to enter into a “colloquy” with me vis-à-vis Gregorian rhythm.

Follow the Discussion on Facebook

Dr. Charles Weaver · August 26, 2022

PDF Download • Mocquereau on Trochee Trouble

This can seem like a dry topic, but it actually often deals with practical issues faced by every choirmaster who wants to promote plainchant.

Jeff Ostrowski · August 25, 2022

“New Gregorian Chant Project” • Part 2

Using this coming Sunday (12th Sunday after Pentecost) as an example.

Jeff Ostrowski · July 11, 2022

Gregorian Chant • Its “True” Rhythm

I’m dumbstruck (with joy) to see that my recent video presentation on plainsong rhythm has garnered quite a number of “views” on VIMEO. I also made the full presentation available on YouTube, and—as I write these words—it has collected 700+ views. How cool is it that folks are still interested in the rhythm of Cantus […]

Corpus Christi Watershed · July 6, 2022

“Chant Rhythm Wars” • Dueling Lectures!

Ostrowski Vs. Weaver: Solesmes Rhythm, Gregorian Semiology, Dom Mocquereau, Dom Pothier, Mensuralism, and more!

Follow the Discussion on Facebook

Dr. Charles Weaver · May 26, 2022

Summer Courses in Sacred Music in New York

This summer, there are several interesting graduate-level courses on offer at St. Joseph’s Seminary in New York.

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Corpus Christi Watershed

President’s Corner

    Luis Martínez Must Go!
    Sevilla Cathedral (entry dated 13 December 1564): The chapter orders Luis Martínez, a cathedral chaplain, to stay away from the choirbook-stand when the rest of the singers gather around it to sing polyphony—the reason being that “he throws the others out of tune.” [Excerpt from “The Life of Father Francisco Guerrero.”]
    —Jeff Ostrowski
    Urgent! • We Desperately Need Funds!
    A few days ago, the president of Corpus Christi Watershed posted this urgent appeal for funds. Please help us make sure we’re never forced to place our content behind a paywall. We feel it’s crucial that 100% of our content remains free to everyone. We’re a tiny 501(c)3 public charity, entirely dependent upon the generosity of small donors. We have no endowment and no major donors. We run no advertisements and have no savings. We beg you to consider donating $4.00 per month. Thank you!
    —Jeff Ostrowski
    “Booklet of Eucharistic Hymns” (16 pages)
    I was asked to create a booklet for my parish to use during our CORPUS CHRISTI PROCESSION on 22 June 2025. Would you be willing to look over the DRAFT BOOKLET (16 pages) I came up with? I tried to include a variety of hymns: some have a refrain; some are in major, others in minor; some are metered, others are plainsong; some are in Spanish, some are in Latin, but most are in English. Normally, we’d use the Brébeuf Hymnal—but we can’t risk having our congregation carry those heavy books all over the city to various churches.
    —Jeff Ostrowski

Quick Thoughts

    Pope Pius XII Hymnal?
    Have you ever heard of the Pope Pius XII Hymnal? It’s a real book, published in the United States in 1959. Here’s a sample page so you can verify with your own eyes it existed.
    —Corpus Christi Watershed
    “Hybrid” Chant Notation?
    Over the years, many have tried to ‘simplify’ plainsong notation. The O’Fallon Propers attempted to simplify the notation—but ended up making matters worse. Dr. Karl Weinmann tried to do the same in the time of Pope Saint Pius X by replacing each porrectus. You can examine a specimen from his edition and see whether you agree he complicated matters. In particular, look at what he did with éxsules fílii Hévae.
    —Corpus Christi Watershed
    Antiphons Don’t Match?
    A reader wants to know why the Entrance and Communion antiphons in certain publications deviate from what’s prescribed by the GRADUALE ROMANUM published after Vatican II. Click here to read our answer. The short answer is: the Adalbert Propers were never intended to be sung. They were intended for private Masses only (or Masses without music). The “Graduale Parvum,” published by the John Henry Newman Institute of Liturgical Music in 2023, mostly uses the Adalbert Propers—but sometimes uses the GRADUALE text: e.g. Solemnity of Saints Peter and Paul (29 June).
    —Corpus Christi Watershed

Random Quote

“The pope regrets that this trade in African slaves, that he believed having ceased, is still exercised in some regions and even more cruel way. He begs and begs the King of Portugal that it implement all its authority and wisdom to extirpate this unholy and abominable shame.”

— ‘Pope Pius VII, writing to the King of Portugal’

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Corpus Christi Watershed is a 501(c)3 public charity dedicated to exploring and embodying as our calling the relationship of religion, culture, and the arts. This non-profit organization employs the creative media in service of theology, the Church, and Christian culture for the enrichment and enjoyment of the public.

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