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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 · June 5, 2014

Video • Pius XII Speaking Fantastic English To Troops Who Liberated Rome!

His Holiness mentions St. Thomas More, St. John Fisher, and others.

Jeff Ostrowski · June 4, 2014

Can You Name These Five Hymns?

Speak now, or forever hold your peace!

Jeff Ostrowski · June 2, 2014

Problematic Sequence Translations In Our Current Lectionary

Are you bothered by the VANDALISM done to Lectionary Sequence translations?

Jeff Ostrowski · May 25, 2014

The Mystery of Missal vs. Gradual has been solved!

Are there concrete reasons to prefer the ancient texts from the Roman Gradual? Short answer: Yes!

Jeff Ostrowski · May 25, 2014

Shall The Nuns Save Us? I Think So.

“Let us continue to do the best things in the worst times.”

Jeff Ostrowski · May 22, 2014

Maurice Lavanoux • “Liturgical Arts”

Anyone have copies of this old magazine?

Jeff Ostrowski · May 20, 2014

Pope St. John Paul II Celebrates Mass “Ad Orientem”

John Paul II leads the congregation facing the traditional way during his June 1999 visit to Poland.

Jeff Ostrowski · May 19, 2014

PDF Download: Extremely Rare Book Of Propers (1962)

A book which Bugnini called the “precursor” to the Simple Gradual is now online!

Jeff Ostrowski · May 15, 2014

Would you know my name if I saw you in heaven?

Musicians tend to fight with one another over the DUMBEST things.

Jeff Ostrowski · May 15, 2014

How To Sing The Gregorian Alleluia

The Alleluia can be confusing, especially during Eastertide.

Jeff Ostrowski · May 14, 2014

Truly Marvelous Image of Saint Isaac Jogues

This lovely image is courtesy of D.F. — taken at Georgetown University.

Jeff Ostrowski · May 11, 2014

How I Learned What Liturgy Really Is

Congregations in South Texas normally applaud for the musicians during Mass.

Jeff Ostrowski · May 9, 2014

An Unexplained Problem

I’m unaware of ANY other liturgical occurrence like this one.

Jeff Ostrowski · May 5, 2014

PDF Download: Ordo Lectionum Missae & Ordo Cantus Missae

“…otherwise the entire Mass might be placed into the vernacular; whereupon the Council fathers burst into uproarious laughter.” — Cardinal Stickler speaking of Vatican II

Jeff Ostrowski · May 1, 2014

Everything You Ever Wanted To Know About Liturgical Translations

This is no hybrid: it’s an elegant, accurate, modern, unified English translation of the Graduale!

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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

“Many other things most justly keep me in the bosom [of the Catholic Church]. The consent of peoples and nations keeps me in the Church; so does her authority, inaugurated by miracles, nourished by hope, enlarged by love, established by age. The succession of priests keeps me, beginning from the very seat of the Apostle Peter, to whom the Lord, after His resurrection, gave it in charge to feed His sheep, down to the present episcopate.”

— Saint Augustine (Epistle against Manichaeus)

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