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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

Jeff Ostrowski • Article Archive

A theorist, organist, and conductor, Jeff Ostrowski holds his B.M. in Music Theory from the University of Kansas (2004). He completed studies in Education and Musicology at the graduate level. Having worked as a church musician in Los Angeles for ten years, in 2024 he accepted a position as choirmaster for Saint Mary of the Immaculate Conception in Michigan, where he resides with his wife and children. —Read full biography (with photographs).

Jeff Ostrowski · August 28, 2021

“Jaw-Dropping Video” • Never expected to see this!

Someone has located rare video footage from the 1950s and 1960s.

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Jeff Ostrowski · August 27, 2021

Breaking! • Cardinal Cupich Bans “Hail, Mary” Prayer

We are not aware of any Church legislation which prohibits saying the “Hail, Mary” after Mass, but Cardinal Cupich seems not to care.

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Jeff Ostrowski · August 27, 2021

27 August 2021 • “DO” a deer?

Giovanni Battista Doni (d. 1647AD) is known for having changed the name of the UT Note—renaming it “Do.” He convinced his contemporaries to make the change by arguing that: (1) “Do” is easier to pronounce than “Ut” is; and (2) “Do” is an abbreviation for “Dominus,” the Latin word for the Lord, Who is the […]

Jeff Ostrowski · August 27, 2021

PDF Download • “Pater Noster” by Van Nuffel (1937)

Throughout my career, I have tried to follow the advice Cardinal Mercier gave the young Fulton J. Sheen.

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Jeff Ostrowski · August 25, 2021

Lace for an Altar Boy’s Surplice? — Yes? No?

This was viewed 9,000+ times on our Facebook page…

Jeff Ostrowski · August 24, 2021

Church Musicians: The Revolution Starts Today!

Do what’s right, say your prayers, offer each day to Jesus Christ, and hold your head high!

Jeff Ostrowski · August 21, 2021

21 August 2021 • “Roman Numerals”

Take a look at the Introit for tomorrow, the 13th Sunday after Pentecost. When we were in school, we would have gotten in trouble if we wrote “xiiii” as Roman Numerals instead of “xiv”—but you can see this was actually quite common.

Jeff Ostrowski · August 21, 2021

“Homily: 13th Sunday after Pentecost” (EF) • Father Valentine Young, OFM

Some people—when they pray the Our Father—believe the words “Thy will be done” actually mean “My will be done…”

Jeff Ostrowski · August 20, 2021

+ Archbishop from Australia

Most Rev’d Dins J. Hart—Archbishop of Melbourne from 2001 to 2018—wrote as follows in 2007: “From my youth I have valued and loved the traditional Mass of the Roman Rite. Since 1970, I have grown to love the Missal of Paul VI. I am delighted that the Missal of Blessed John XXIII has been restored […]

Jeff Ostrowski · August 17, 2021

A Teaching Moment • Including “Hail, Holy Queen Enthroned Above”

Why on earth does the cost of butter matter?

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Jeff Ostrowski · August 17, 2021

+Di Noia Publicly Denigrates TLM

Archbishop Di Noia recently claimed that the Faithful’s hunger for the Traditional Mass “has gotten totally out of control and become a movement, especially in the United States, France, and England…” The former vice-president of Ecclesia Dei declared that “Pope Francis is right to see in the repristination of the pre-conciliar liturgy at best a […]

Jeff Ostrowski · August 14, 2021

PDF Download • “Vespers Booklet” (15 August, Assumption) — 20 pages

Also included, an organ accompaniment (23 pages) for this booklet.

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Jeff Ostrowski · August 14, 2021

PDF Download • “Ave Maris Stella” (Organ Accompaniment)

The second part has blank staves—so you can compose your own organ harmonies!

Jeff Ostrowski · August 13, 2021

“Part 3 of 3” • Guerrero Kyrie for Our Lady

This is—perhaps—the most phenomenally gorgeous piece ever written.

Jeff Ostrowski · August 12, 2021

PDF Download • Hymn for the Assumption • (Soprano, Alto, Tenor, Bass)

This hymn was originally for the Assumption, but now can be used on various Marian feasts.

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Corpus Christi Watershed

President’s Corner

    💲 5.00 💵
    Our tiny 501(c)3 nonprofit organization exists solely by generous readers who donate $5.00 per month. We have no endowment; we have no major donors; we run no advertisements; we have no savings. A donor wrote to us: “I so appreciate all you do and have done, and your generosity is unprecedented. I am honored to be able to make a monthly contribution.” Another monthly donor says: “Thank you for everything CC Watershed does. We are able to add so much solemnity to Holy Mass due to the resources made available here.” Can you spare a few dollars each month to help us survive?
    —Corpus Christi Watershed
    Dom Pothier • Photo from 1904
    Dom Paul Cagin, in a 1904 publication (L’oeuvre de Solesmes dans la restauration du chant grégorien) made sure to include a beautiful image of Dom Pothier, the legendary abbot of St-Wandrille. Also shown is a very young Dom André Mocquereau. Auguste Pécoul—considered the spiritual “son” of Abbat Prosper Guéranger of Solesmes—wrote as follows on 24 June 1901: “To forestall any confusion, let us remember that there is just one Gregorian notation—that restored, according to the ancient manuscripts, by the eminent Abbot of Saint-Wandrille, Dom Pothier.” ✠
    —Jeff Ostrowski
    PDF • “3-Voice Motet” (Father De Laet)
    I believe 99% of our readers will recognize this hymn tune. Perhaps Father Edgard De Laet should have called it a ‘hymn’ instead of a ‘motet for three voices’—but he’s technically correct, since MOTET is defined as: “a short piece of sacred choral music, typically polyphonic and unaccompanied.” The even verses are for three voices, as you will see if you download the PDF score at #20245. The odd verses may be song a cappella SATB or unison with organ.
    —Jeff Ostrowski

Quick Thoughts

    “Reminder” — Month of Febr. (2026)
    On a daily basis, I speak to people who don’t realize we publish a free newsletter (although they’ve followed our blog for years). We have no endowment, no major donors, no savings, and refuse to run annoying ads. As a result, our mailing list is crucial to our survival. It couldn’t be easier to subscribe! Just scroll to the bottom of any blog article and enter your email address.
    —Jeff Ostrowski
    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

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  • “Reminder” — Month of Febr. (2026)
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  • Dom Pothier • Photo from 1904

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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.