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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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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 21, 2020

PDF Download • “Lucis Creator Optime” (Vespers Hymn)

I followed the “Brébeuf hymnal method,” in which every verse is written out…

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Jeff Ostrowski · January 20, 2020

Comparison • “1909 Missal vs. 1999 Missal”

A picture is truly worth 1,000 words!

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Jeff Ostrowski · January 20, 2020

Fr. Valentine Young, OFM — R.I.P.

Father Valentine Young, OFM—a faithful Catholic priest—died on 17 January 2020 around 8:00am.

Jeff Ostrowski · January 17, 2020

A quote from Fr. Valentine

Speaking of “nihil solliciti estis,” Fr. Valentine recently said: “I’ll bet that most people, including myself, have suffered more from things that never happened than from things that actually did happen.” Wise words!

Jeff Ostrowski · January 16, 2020

Circle is complete

This is interesting! We have made it all the way around the liturgical year for Vespers organ accompaniments—which means all we have to do now is fill in the “holes,” such as Candlemas.

Jeff Ostrowski · January 16, 2020

(2007) Fr. Valentine Young Speaks About Religious Habits In The 1960s

I desire to post more of these fascinating videos, as soon as I can find the time.

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Jeff Ostrowski · January 16, 2020

Fr. Valentine is very sick

I beg you to pray for Fr. Valentine Young, OFM, who I am told is dying (or may possibly have died already). He’s one of the most faithful & generous priests I know. There would be no CCWatershed without Fr. Valentine.

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Jeff Ostrowski · January 16, 2020

Website progress update

As of 15 January 2020, the website is still under construction. We have made progress, but there is still much to do. We thank James Doherty and Veronica Brandt for their generous assistance!

Jeff Ostrowski · January 15, 2020

What Palestrina Did With Kyrie II (“Fons Bonitatis”)

Many erroneously believe the Kyrie was the only thing troped, but that’s not even close to true.

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Jeff Ostrowski · January 14, 2020

A very serious issue

So few Catholics—even those who self-identify as “traditional” Catholics—give consideration to the sins of detraction, gossip, and libel. Some hide behind fake online identities and publish the most vile, dishonest material. Even though these hypocrites think they are “hidden,” God sees everything. By the way, never visit Twitter: it’s not a good place for one’s […]

Jeff Ostrowski · January 14, 2020

A Phenomenal Epiphany Hymn!

I wish Epiphany lasted forever—the hymns are rich with theology!

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Jeff Ostrowski · January 14, 2020

Chocolate as payment?

Church musicians realize we’re currently in tough times, but even the greatest artists did not have everything “exactly as they desired.” Vladimir Horowitz (one of the greatest pianists) was often paid for his concerts with CHOCOLATE instead of money. The Russian economy was awful, and nobody had money. But Horowitz didn’t want chocolate; he wanted […]

Jeff Ostrowski · January 7, 2020

JMO Copy (inviolable) St. Jean de Lalande Library of Rare Books

JMO Copy (inviolable) St. Jean de Lalande Library of Rare Books “The judicious searcher in this remarkable online collection will certainly reap great rewards for his effort.” — Fr. Robert A. Skeris, Benjamin T. Rome School of Music (CUA) HE SAINT Jean de Lalande Library is derived primarily from Jeff Ostrowski’s personal collection of rare […]

Jeff Ostrowski · December 31, 2019

Hymn • “A Solis Ortus Cardine” (In English)

The Church’s greatest hymn? Many believe it’s this one.

Jeff Ostrowski · December 30, 2019

PDF Accompaniment • “Jesu Redemptor Omnium”

You can compare my accompaniment to that of Achille P. Bragers.

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Corpus Christi Watershed

President’s Corner

    PDF Download • “Organ Accompaniment”
    Over the past few years, I’ve been harmonizing all the vernacular plainsong Introit settings by the CHAUMONOT COMPOSERS GROUP. This coming Sunday—10 May 2026—is the 6th Sunday of Easter (Year A). The following declaration will probably smack of “blowing my own horn.” However, I’d rank this accompaniment as my best yet. In this rehearsal video, I attempt to sing it while simultaneously accompanying myself on the pipe organ. The musical score [for singers] as well as my organ accompaniment can be downloaded free of charge from the flourishing feasts website.
    —Jeff Ostrowski
    “Gregorian Chant Quiz” • 4 May 2026
    A few days ago, the CORPUS CHRISTI WATERSHED Facebook page posted this Gregorian Chant quiz regarding a rubric for the SEQUENCE for the feast of Corpus Christi: “Lauda Sion Salvatórem.” There is no audience more intelligent than ours—yet surprisingly nobody has been able to guess the rubric. Drop me an email with the right answer, and I’ll affirm your brilliance to everyone I encounter!
    —Jeff Ostrowski
    “Rare Photographs” • Hannibal Bugnini
    On 2 September 2025, we included in this article extremely rare photographs of Archbishop Hannibal Bugnini taken in Iran circa 1979. Bugnini had initially been banished by the pope to Uruguay, but he refused to obey. [This is interesting, since Bugnini relied upon ‘blind obedience’ when it came to modifications of the ancient liturgy.] After he refused to obey the order from the pope, Hannibal Bugnini was banished to Iran. You can also watch a short video of Hannibal Bugnini in Iran, dated 10 November 1979. That’s about a week after the USA embassy hostage crisis began in Tehran, and Pope Saint John Paul II had sent the leader of the Iranian Revolution a special letter.
    —Jeff Ostrowski

Quick Thoughts

    PDF Download • “Anima Christi”
    I received a request for an organ accompaniment I created way back in 2007 for the “Anima Christi” Gregorian Chant. You can download this PDF file which has the score in plainsong followed by a keyboard accompaniment. Many melodies have been paired with “Anima Christi” over the centuries, but this is—perhaps—the most common one.
    —Jeff Ostrowski
    PDF • “Liturgical Law” (467 Pages)
    On Good Friday during the middle ages, the pope privately recited THE ENTIRE PSALTER. If you don’t believe me, see for yourself by reading this passage by Dom Charles Augustine Bachofen (d. 1943). His famous book—called “Liturgical Law: A Handbook Of The Roman Liturgy”—was published by the Benjamin Herder Book Company, which was the American arm (operating out of St. Louis, Missouri) of one of the world’s most significant Catholic publishers. Dom Charles Augustine Bachofen was born in Switzerland but spent his career between the Benedictine monasteries at Conception (Missouri) and Mount Angel (Oregon). His 1931 masterpiece, Liturgical Law can be downloaded as a PDF file … 467 pages!
    —Jeff Ostrowski
    “Gregorian Chant Quiz” • 24 March 2026
    How well do you know your Gregorian hymns? Do you recognize the tune inserted into the bass line on this score? For many years, we sang the entire Mass in Gregorian chant—and I mean everything. As a result, it would be difficult to find a Gregorian hymn I don’t recognize instantly. Only decades later did I realize (with sadness) that this skill cannot be ‘monetized’… This particular melody is used for a very famous Gregorian hymn, printed in the LIBER USUALIS. Do you recognize it? Send me an email with the correct words, and I promise to tell everybody I meet about your prowess!
    —Jeff Ostrowski

Random Quote

Thus the priest-celebrant, putting on the person of Christ, alone offers sacrifice, and not the people, nor clerics, nor even priests who reverently assist. All, however, can and should take an active part in the Sacrifice. “The Christian people, though participating in the Eucharistic Sacrifice, do not thereby possess a priestly power,” We stated in the Encyclical Mediator Dei (AAS, vol 39, 1947, p. 553).

— Pope Pius XII (2 November 1954)

Recent Posts

  • PDF Download • “Organ Accompaniment”
  • “Gregorian Chant Quiz” • 4 May 2026
  • “Rare Photographs” • Hannibal Bugnini
  • “Regina Caeli” • More Than You Wanted To Know
  • Music List • “5th Sunday of Easter” (Year A)

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