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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

Cardinal Ferdinando Giuseppe Antonelli OFM

Jeff Ostrowski · November 16, 2025

PDF Download • “Pope Pius XII Psalter” — English, Latin, and Commentary (532 pages)

I know of no greater commentary on the psalms. Its author—an erudite Dominican priest—founded the famous “Homiletic and Pastoral Review.”

Jeff Ostrowski · March 31, 2025

Possible Error? • 4th Sunday of Lent

Because the post-conciliar liturgical reforms were done with such haste, we sometimes find errors.

Veronica Moreno · March 23, 2025

PDF Download • Palestrina “Alleluia” (SATB) for the Ordinary or Extraordinary Form

Last week, a major bombshell was dropped with regard to two major publishing companies of Catholic hymnals.

Jeff Ostrowski · July 4, 2024

PDF Download • “Entrance Chant” — 14th Sunday in Ordinary Time (Year B)

I’d love to hear you sing this!

Jeff Ostrowski · February 6, 2024

“Mass in the Vernacular?” • Seven (7) Considerations

Should Mass be in Latin or English? Or should it be a mixture?

Jeff Ostrowski · January 29, 2024

PDF Score • “Mass Setting I Wrote For Corrinne”

I demonstrate how the “Kyrie Eleison” can be adapted for use in the Extraordinary Form.

Jeff Ostrowski · November 21, 2023

Jeff Ostrowski’s Performance of Plainsong Attacked as “Inartistic”

The special Vigil of Christmas “Alleluia” sung according to the official rhythm of the Catholic Church.

Jeff Ostrowski · July 18, 2023

Rude Priests, Rude Deacons, Rude Ushers, Rude Parishioners, Rude Choristers, Etc.

Unless I’m mistaken, this charming piece can be played on organ manuals alone.

Jeff Ostrowski · May 6, 2023

PDF Download • “Brief Choral Alleluia” (Suitable for the Ordinary and Extraordinary Form)

Too many priests are ignorant of the glories of authentic sacred music.

Jeff Ostrowski · July 26, 2022

Open Letter to Bishop Roche • “12 Considerations”

I write in response to the 6 July 2022 statement by Pope Francis: “Make your voices heard! If they do not listen to you, shout even louder.”

Jeff Ostrowski · April 7, 2022

“Schizophrenia” • Pius XII Annihilated Tenebræ

I know of no author who has attempted to reconcile, explain, or justify the (obviously contradictory) “schizophrenia flaw.”

Jeff Ostrowski · December 9, 2021

Archbishop Lefebvre Pushed For Vernacular Readings?

Louis Bouyer—the priest chosen to compose “Eucharistic Prayer II”—condemned the liturgical reforms when he saw the results.

Jeff Ostrowski · November 11, 2021

Cardinal Cupich Responds To Our Article!

Cardinal Antonelli: “I have the impression that much has been conceded to the Protestant mentality, especially in matters regarding the sacraments.”

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Jeff Ostrowski · October 21, 2021

PDF Download • “Did Vatican II Reform The Mass?”

Three (3) bullet points, written on a single sheet of paper.

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Jeff Ostrowski · October 10, 2021

A Puzzling Assertion by Bishop Arthur Roche (Congregation for Divine Worship)

Is backroom bowdlerization of Sacred Scripture truly irreversible?

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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—1 March 2026—the 2nd Sunday of Lent (Year A). If such a thing interests you, feel free to download it as a PDF file. As always, the Responsorial Psalm, Gospel Acclamation, and Mass Propers for this Sunday are available at the flourishing feasts website alongside the official texts in Latin.
    —Jeff Ostrowski
    Particularly Beautiful
    The 2nd Sunday of Lent has magnificent propers. Its INTROIT is particularly striking—using a haunting tonality—but the COMMUNION with 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
    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

Giovanni Doni is known for having changed the name of note “Ut,” renaming it “Do.” He convinced his contemporaries to make the change by arguing that 1) “Do” is easier to pronounce than “Ut,” and 2) “Do” is an abbreviation for “Dominus,” the Latin word for the Lord, Who is the tonic and root of the world. There is much academic speculation that Giovanni Doni also wanted to imprint himself into musical canon in perpetuity because “Do” is also ulteriorly an abbreviation for his family name.

— Giovanni Battista Doni died in 1647AD

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  • Which Mass?

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