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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 · January 26, 2016

Chosen Your Easter Alleluia Yet?

It’s time—and here’s one you’ll love.

Jeff Ostrowski · January 26, 2016

Not Your Grandmother’s Creed

Composer David Haas posted a striking proclamation on his Facebook page.

Jeff Ostrowski · January 24, 2016

Musical Resources • Septuagesima Sunday (Extraordinary Form)

Yet the laborer called at the eleventh hour does not taste the joy reserved to one who has “worked and suffered without reckoning the hours.”

Jeff Ostrowski · January 19, 2016

| Part 3 of 3 | • “Kyrie Eleison” (SATB) within the reach of any choir!

Only one word describes Guerrero’s musical genius: fearsome.

Jeff Ostrowski · January 17, 2016

The Pope Who Had … A Child?

Then the Pope declared that it was the motet’s words—not its melody—which annoyed him.

Jeff Ostrowski · January 17, 2016

Musical Resources • 2nd Sunday after Epiphany (Extraordinary Form)

“Sanctify, O Lord, the gifts we offer, and purify us from the stains of our sins…”

Jeff Ostrowski · January 14, 2016

Staggering Canonic Setting • “Gloria” from Mass III

By the French Roman Catholic composer, Raphaël Mercier (d. 1953).

Jeff Ostrowski · January 11, 2016

Ludwig Passini: “Canons in the Church of St. Peter”

Their garments resemble the “winter” cappa magna.

Jeff Ostrowski · January 11, 2016

Gregory Ceurvorst Harmonizing The Chabanel Psalms

I saw something cool on YouTube.

Jeff Ostrowski · January 9, 2016

Musical Resources • Feast of the Holy Family (Extraordinary Form)

“O Lord Jesus Christ, who—in the days of thy sub­jec­tion to Mary and Joseph—didst consecrate home life by ineffable acts of virtue…”

Jeff Ostrowski · January 9, 2016

Letter To The FSSP Choir In Los Angeles

There’s something less scary you can do to help build up God’s Kingdom.

Jeff Ostrowski · January 9, 2016

VIDEO • Archbishop Fulton J. Sheen & William F. Buckley

In 1971, Sheen appeared on “Firing Line” and spoke about St. Augustine.

Jeff Ostrowski · January 8, 2016

The Miraculous Rise Of The Traditional Latin Mass

A puzzling article appeared in the National Catholic Register by Msgr. Charles Pope.

Jeff Ostrowski · January 7, 2016

Bishop René H. Gracida On Internet Porn

“Parents, love your children and do your best to shield them from exposure to pornography.” —Bishop Gracida

Jeff Ostrowski · January 5, 2016

Church Music: True Diversity Vs. False Diversity

Liturgical progressives constantly praise the “stylistic diversity” of the Ordinary Form, but the truth is surprising.

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Corpus Christi Watershed

President’s Corner

    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
    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

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

Far from dreading an encounter with the Iroquois, Fr. Garnier often told us he would be quite content to fall into their hands and remain their prisoner if—while they were torturing him—he at least had a chance of instructing them as long as his torments lasted. If they allowed him to live, it would afford him a golden opportunity to work for their conversion, which was now impossible, since the gateway to their country was closed as long as they were our enemies.

— Father Ragueneau (Jesuit Relations)

Recent Posts

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  • Fulton J. Sheen • “24-Hour Catechism”
  • Music List • (2nd Sunday of Lent)
  • PDF Download • “Funerals in the Ordinary Form”

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