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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

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Jeff Ostrowski · February 15, 2023

PDF • 2014 Dissertation: “Plainchant Influence on the Liturgical Music of Dr. Marier” (324 pages)

This treatise (324 pages) is a “must read” for anyone who cares about liturgical music in the Catholic Church.

Jeff Ostrowski · February 9, 2023

PDF Download • “Gorgeous Image!”

Saint John Mary Vianney (d. 1859) is one of my favorite saints. Our readers will want to download this gorgeous stained glass window which depicts Father Vianney, the holy Curé d’Ars.

Jeff Ostrowski · February 8, 2023

PDF Download • Symposium Kyrie Revealed

People often complain: “Catholic priests won’t pay a living wage for choir directors, yet gladly pay millions to purchase a pipe organ.”

Corpus Christi Watershed · February 1, 2023

Filling Up Fast! • Sacred Music Symposium

“The Sacred Music Symposium was a vehicle of grace that changed my life.” —2019 Participant

Jeff Ostrowski · January 31, 2023

PDF Download • Belgian Book of Gregorian Accompaniments (Official Edition)

We paid to have this extremely rare book scanned professionally.

Jeff Ostrowski · January 25, 2023

PDF Download • 1909 “Modern Notation” Gradual (Extremely Rare) — 712 Pages

The truth is stranger than fiction.

Jeff Ostrowski · January 17, 2023

PDF Download • “Keenly Rare!” • Gregorian Chant Booklet on 5 Lines (1920) — 326 Pages

There must have been a need for such a booklet, otherwise he would not have gone to the trouble of creating it!

Jeff Ostrowski · January 15, 2023

PDF Download • “Organ Accompaniment Booklet” (25 pages) — Vespers, 2nd Sunday after Epiphany

The internet is putting good people in touch with one another.

Andrea Leal · January 13, 2023

New Lectionary for the USA • Coming in 2028?

“Work hasn’t even begun on the next Lectionary, and there’s nothing definite about 2028 as a date.” — Father Andrew V. Menke, director of the USCCB liturgical committee

Jeff Ostrowski · January 13, 2023

Hymn Experiment • “Does This Work?”

If memory serves, his exact words were: “Gee, I never thought about that before.” Astonishing!

Jeff Ostrowski · January 11, 2023

PDF Download • Max Springer’s Gradual in Modern Notation (870 pages) — Extravagantly Rare!

In addition to this rare book by Max Springer (870 pages), I release the draft copy of a new Gregorian project (157 pages).

Jeff Ostrowski · January 4, 2023

PDF Download • The Official Funeral Booklet for Pope Benedict XVI (37 pages)

We strive to emphasize the positive on this blog, but I have to admit…

Jeff Ostrowski · January 4, 2023

PDF Download • “Corde Natus Ex Parentis” w/ Modern Harmonies (4 pages)

She said: “Jeff, you should record these harmonies with human voices, to illustrate what you mean.”

Jeff Ostrowski · January 1, 2023

PDF Download • “Graduale Romanum” Organ Accompaniments by Dr. Peter Wagner (513 pages)

Dr. Peter Wagner, a famous musicologist, founded the “Gregorian Academy” in Freiburg (Switzerland).

Jeff Ostrowski · December 31, 2022

“Requiescat In Pace” • Pope Emeritus Benedict XVI

Let us pray for the repose of the soul of Josef Ratzinger, who did so much good for the church.

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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

When a friend speaks of his accomplishments and triumphs, he stands at a distance from our heart. When he shares his weaknesses and failings, he’s very near.

— Archbishop Fulton J. Sheen

Recent Posts

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  • Music List • (2nd Sunday of Lent)
  • PDF Download • “Funerals in the Ordinary Form”

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