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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 8, 2016

Do You Recognize This Hymn Tune?

The Brébeuf hymnal will include texts by contemporary Roman Catholic poets.

Jeff Ostrowski · November 8, 2016

Hysteria Over CDW Appointments?

Including two myths: one about the EF, and one about the OF.

Jeff Ostrowski · November 8, 2016

Do You Recognize This Hymn Tune? 1

The Brébeuf hymnal will include texts by contemporary Roman Catholic poets.

Jeff Ostrowski · November 4, 2016

Musical Resources • 6 November (Extraordinary Form)

“Grant that…through this sacrament which we have received, whatever is evil in our hearts may be restored by its gift of healing.”

Jeff Ostrowski · November 3, 2016

New Release! • “Dies Irae” Rehearsal Video

Also includes a printable score with literal English translation!

Jeff Ostrowski · November 1, 2016

“Sanctus” Recorded By Young Ladies From Las Vegas • Fabulous!

Palestrina cleverly interweaves an ancient hymn.

Jeff Ostrowski · October 30, 2016

“Kyrie VIII” Organ Accompaniment by Flor Peeters

…with the Solesmes markings.

Jeff Ostrowski · October 30, 2016

Musical Resources • Feast of Christ the King

“Ask of Me, and I will give thee the nations for thine inheritance…”

Jeff Ostrowski · October 24, 2016

“Pleni sunt coeli et terra gloria tua.”

Living in Los Angeles—what I miss most.

Jeff Ostrowski · October 24, 2016

PDF Download • Rare Hymnal by Organist at the Birmingham Oratory (1913)

Download all 572 pages—thanks to Peter Meggison!

Jeff Ostrowski · October 23, 2016

Musical Resources • 23rd Sunday after Pentecost

“Remit, we beseech Thee, O Lord, the sins of Thy people…”

Jeff Ostrowski · October 19, 2016

Watershed: Established Ten Years Ago Today!

What keeps us going is our wonderful readers, whose kindness and witness inspire us.

Jeff Ostrowski · October 18, 2016

Palestrina • Jaw-Dropping “Kyrie” based on a Hymn

Two generous young ladies, currently in high school, helped me record this gorgeous Kyrie.

Jeff Ostrowski · October 17, 2016

“The Organist At Sung Mass” —Fr. Adrian Fortescue

Thoughts on “the hidden struggles” of a choirmaster.

Jeff Ostrowski · October 14, 2016

Complete Palestrina Edition • Now Online!

His Mass settings alone require 2,349 pages!

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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

“Just before he left Letchworth, as he well knew to meet his death, he turned and bade good-bye to his little church, and silently kissed the altar-stone on which he had so frequently offered Mass.”

— From the life of Father Adrian Fortescue

Recent Posts

  • PDF • “Cantus Mariales” (192 pages)
  • PDF Download • Fourteen (14) Versions of the Splendid Hymn: “Salve Mater Misericordiae”
  • Fulton J. Sheen • “24-Hour Catechism”
  • Music List • (2nd Sunday of Lent)
  • PDF Download • “Funerals in the Ordinary Form”

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