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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 29, 2015

The Ordinary Form’s Incredible Freedom

Here’s a chart with rubrics from the 1974 “Graduale” translated into English.

Jeff Ostrowski · August 27, 2015

Be Amazed By This Two-Minute Clip About Cathedrals!

Astounding video about how the Amiens Cathedral was saved by a medieval “iron band-aid.”

Jeff Ostrowski · August 26, 2015

Musical Resources • 14th Sunday after Pentecost (Extraordinary Form)

“Reconciled for evermore to thy Church, do thou watch over her, O Lord…”

Jeff Ostrowski · August 26, 2015

PDF Download • Rossini’s “Canticum Novum” (1935)

A Collection of 115 Motets and Hymns, with an Easy Mass for Two Equal Voices.

Jeff Ostrowski · August 25, 2015

A Most Astounding “Graduale” From 1909 … On Modern Staves!

University professors don’t sit around wondering whether they should teach the music of Tomás Luis de Victoria or Marty Haugen.

Jeff Ostrowski · August 25, 2015

SATB “Alleluia” By Palestrina • Brief, Easy, & Sumptuous

I dare you NOT to immediately assign this piece to your choir!

Jeff Ostrowski · August 23, 2015

Organ Accompaniment • “Christe Supreme”

When your choir isn’t ready for polyphony…

Jeff Ostrowski · August 22, 2015

The Weirdest Thing About Renaissance Motets

A priest named “Reuschius”…

Jeff Ostrowski · August 19, 2015

Musical Resources • 13th Sunday after Pentecost (Extraordinary Form)

“We have received, O Lord, thy heavenly sacrament…”

Jeff Ostrowski · August 19, 2015

Chabanel Psalms … In Dutch?

The cantors do something I never thought of in this video…

Jeff Ostrowski · August 18, 2015

Improve Your Parish’s Liturgy … Instantaneously!

“Until we are blue in the face, we could repeat what Vatican II said about Gregorian chant…”

Jeff Ostrowski · August 17, 2015

PDF Download • “Mount Mary Hymnal” (1937)

All 255 pages of this famous hymn book can now be downloaded as a PDF.

Jeff Ostrowski · August 13, 2015

Musical Resources • 12th Sunday after Pentecost (Extraordinary Form)

The “Testament of the Spirit” is the new and permanent covenant established by Jesus Christ between God and men.

Jeff Ostrowski · August 12, 2015

Cardinal Sarah’s Powerful Letter Available In English!

“Adoremus Bulletin” has uploaded a translation of the CDW Prefect’s document.

Jeff Ostrowski · August 11, 2015

Evelyn Waugh Requiem Panegyric Preached At Westminster By Fr. Caraman (21 April 1966)

“Evelyn was sad when he read of churches in which the old altar was taken down…”

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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

“The following question is asked by the Most Reverend Lord Bishop of the Diocese of Chur: May this Diocese’s ancient custom be continued of having the Celebrant in Sung Masses (excepting more solemn Masses) intone the Credo and when he is finished reciting it going on immediately to the offertory and finishing it while the credo is being sung by the choir?” (Dubium of Dec 1909)

— 11 December 1909

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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.