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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 · November 7, 2015

Simple 2-Part Canon For Men & Women

You will love what Henri Durieux has done with this hymn melody.

Jeff Ostrowski · November 5, 2015

Liturgical Press Has An “Oops” Moment

“If we had known what the prayers really said, we would not have wanted to pray them any longer.” —Paul Inwood

Jeff Ostrowski · November 1, 2015

Musical Resources • Feast of All Saints (November 1st)

“…most humbly we pray that—since so great is the number of thine elect pleading in our behalf—we may partake, in all their fulness, of thine abounding mercies…”

Jeff Ostrowski · October 30, 2015

“Te Saeculorum” • Simple, Sensational, SATB

Were you aware of this amazing piece by Raphaël Mercier?

Jeff Ostrowski · October 26, 2015

PDF Download • “Story of Redemption” for Children (1952) • With Audio Recordings!

“I’m sure you’ll enjoy the beautiful poems, songs, and pictures…” —Very Rev. Norbert M. Shumaker

Jeff Ostrowski · October 23, 2015

Musical Resources • Feast of Christ the King (Extraordinary Form)

“And all the kings of the earth shall adore Him; all nations shall serve Him…”

Jeff Ostrowski · October 21, 2015

PDF Download • “Christ The King Hymnal” (1955)

An extremely rare Canadian hymnal produced by Rev. Aloysius Knauff.

Jeff Ostrowski · October 19, 2015

Beautiful Photo Of Blessed Pope Paul VI

The entrance procession from his coronation.

Jeff Ostrowski · October 19, 2015

Watershed Turns Nine Today!

Talking about perennial truths doesn’t get as many “clicks” as provocative headlines or character assassination.

Jeff Ostrowski · October 17, 2015

Musical Resources • 21st Sunday after Pentecost (Extraordinary Form)

“…in Thine infinite mercy, O Lord, restore our souls to health…”

Jeff Ostrowski · October 17, 2015

Yikes! Even The Monastery Of Solesmes

Did you notice how they carefully deleted all the beautiful artwork?

Jeff Ostrowski · October 16, 2015

Watershed Needs Your Help To Continue!

“Watershed has been extremely helpful and has brought so much solace and support…”

Jeff Ostrowski · October 15, 2015

What? Sundays after Pentecost?

Be careful this year.

Jeff Ostrowski · October 14, 2015

When Choirmasters Despair

No matter how superb your music program is…

Jeff Ostrowski · October 11, 2015

Kyrie XI • Gregorian Chant

I’ve wrongly neglected this famous chant.

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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

“The plan to definitively abolish the traditional Tridentine Mass … if it is true, seems to me to be an insult to the history of the Church and to Sacred Tradition, a diabolical project that seeks to break with the Church of Christ, the apostles, and the saints.”

— The Vatican’s chief liturgist (appointed by Pope Francis) from 2014-2021

Recent Posts

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