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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 · July 7, 2014

What Should Female Lectors Wear At Mass?

Not one shred of iconographical evidence contradicts the alb as being a priestly vestment.

Jeff Ostrowski · July 7, 2014

Family Von Trapp & Celebration “Versus Populum”

Is the Trapp Family priest saying Mass “facing the people” in the 1930s?

Jeff Ostrowski · July 3, 2014

Bishop Conley Sings “Salve Regina” With A Whole Pack Of Bishops

How often do you see a whole bunch of bishops sitting around singing the Salve Regina?

Jeff Ostrowski · July 2, 2014

Why On Earth Would Anyone Do This?

Am I a hypocrite?

Jeff Ostrowski · June 30, 2014

“No Propers? No High Mass!” — 1933 Article

“…at these High Masses, the choir omits the Gloria, Credo, Gradual, Tract and Sequence.” — Answer: “The method is an abuse and must be done away with.”

Jeff Ostrowski · June 27, 2014

PDF Download: Complete Proper Of The Mass, With Organ Accompaniment • Kansas (1946)

Two priests from Kansas — Fr. Herman Koch & Fr. Andrew Green — created this remarkable collection in the 1940s.

Jeff Ostrowski · June 26, 2014

First Time Attending A Novus Ordo Mass

If you can explain why the GLORY & PRAISE has an eagle flying across page 37, you get a cookie.

Jeff Ostrowski · June 19, 2014

Sensational Review Of The Jogues Illuminated Missal By Dr. Peter Kwasniewski

Rigorous and Resplendent Review of the Jogues Illuminated Missal.

Jeff Ostrowski · June 16, 2014

Archbishop Sample’s Letter On Sacred Music (1 of 8)

We’ve teamed up to create an 8-part series on Archbishop Sample’s momentous 2013 letter. Today, Jeff Ostrowski introduces the series.

Jeff Ostrowski · June 12, 2014

Antiphons in the Gradual don’t match the Roman Missal, 3rd edition?

Why aren’t the Propers from the Roman Gradual identical to the Mass Propers printed in the Roman Missal? • “Recent research … has made it clear that the antiphons of the Order of Mass were never intended to be sung.” — Bishop Donald Trautman (2007)+

Jeff Ostrowski · June 12, 2014

Newly-Ordained Priest Murdered in Phoenix

Fr. Joseph Terra, FSSP, was also seriously wounded in this burglary-turned-murder.

Jeff Ostrowski · June 9, 2014

The Famous “Agatha Christie” Indult

“If some senseless decree were to order the total or partial destruction of basilicas or cathedrals, then
obviously it would be the educated — whatever their personal beliefs — who would rise up in horror to oppose such a possibility.”

Jeff Ostrowski · June 9, 2014

Is There Truly “Versus Populum” Celebration? Vatican Says No.

Can AD ORIENTEM be excluded from the Novus Ordo? Vatican says: “Negatively, and in accordance with the following explanation.”

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!

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Corpus Christi Watershed

President’s Corner

    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
    Which Mass?
    In 1905, when the Vatican Commission on Gregorian Chant began publishing the EDITIO VATICANA—still the Church’s official edition— they assigned different Masses to different types of feasts. However, they were careful to add a note (which began with the words “Qualislibet cantus hujus Ordinarii…”) making clear “chants from one Mass may be used together with those from others.” Sadly, I sometimes worked for TLM priests who weren’t fluent in Latin. As a result, they stubbornly insisted Mass settings were ‘assigned’ to different feasts and seasons (which is false). To understand the great variety, one should examine the 1904 KYRIALE of Dr. Peter Wagner. One should also look through Dom Mocquereau’s Liber Usualis (1904), in which the Masses are all mixed up. For instance, Gloria II in his book ended up being moved to the ‘ad libitum’ appendix in the EDITIO VATICANA.
    —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

At papal Masses, the regulations against tardiness were more stringent than at Masses celebrated by cardinals or bishops. Giovanni Maria Nanino records that any singer who is not in his place—and in his vestments—by the end of the repetition of the “Introit” will be fined eight vinti. At papal Vespers, the singer who is not present at the “Gloria Patri” of the first psalm pays a fine of fifty balocchi.

— Giovanni M. Nanino (d. 1607), Papal “Maestro di Cappella”

Recent Posts

  • Music List • (2nd Sunday of Lent)
  • PDF Download • “Funerals in the Ordinary Form”
  • Extreme Unction
  • Like! Like! Like!
  • Which Mass?

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