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Corpus Christi Watershed

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Views from the Choir Loft

President's Corner

Jeff Ostrowski · June 20, 2026

Oldest Latin Eucharistic Hymn

A Spanish version; please listen and let us know your thoughts!

Jeff Ostrowski · June 19, 2026

Rare Plainsong Accompaniments

Some consider these 3-part accompaniments to be the rarest in the world.

Jeff Ostrowski · June 15, 2026

“Hidden Chant” • For the Ordinary Form

Not even the magnificent “GregoBase”—which is incredibly comprehensive—realizes music for this antiphon was published by the Vatican in the 1930s.

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Jeff Ostrowski · June 10, 2026

“Citation Needed” • Dom Foote of ICEL

Father Basil Foote, OSB, served on the Music Sub-Committee of the “International Commission on English in the Liturgy” (ICEL).

Jeff Ostrowski · June 6, 2026

Music List • “Corpus Christi” (Year A)

The 28-page Singers’ Booklet is included. Our children’s choir will join us for this Mass.

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Jeff Ostrowski · June 1, 2026

PDF Download • “Rubric Challenge”

So far, nobody has guessed correctly. (Challenge posted a few weeks ago.)

Jeff Ostrowski · May 27, 2026

Music List • “Trinity Sunday” (Year A)

Readers have expressed interest in examining my “music list” for this coming Sunday.

Jeff Ostrowski · May 26, 2026

“Entrance Chant” • Feast of Corpus Christi

Very difficult to imagine a more gorgeous mode than Mode 7.

Jeff Ostrowski · May 14, 2026

Music List • “Ascension of the Lord”

Readers have expressed interest in examining my “music list” for this coming Sunday.

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Jeff Ostrowski · May 8, 2026

PDF Download • “For Pentecost Sunday”

There’s a triple ‘allelúja’ and I just love the chord at the end of the 2nd iteration.

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Jeff Ostrowski · May 4, 2026

PDF Download • “Organ Accompaniment”

The following declaration will probably smack of “blowing my own horn.”

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Jeff Ostrowski · May 4, 2026

“Gregorian Chant Quiz” • 4 May 2026

How well do you know your Gregorian Chant?

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Jeff Ostrowski · May 4, 2026

“Rare Photographs” • Hannibal Bugnini

These are currently ‘making the rounds’ on Twitter.

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Jeff Ostrowski · May 2, 2026

Music List • “5th Sunday of Easter” (Year A)

Readers have expressed interest in examining my “music list” for this coming Sunday.

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Jeff Ostrowski · April 30, 2026

PDF Download • Communion for Sunday

Such a shame it only comes every three years…

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Corpus Christi Watershed

President’s Corner

    Oldest Latin Eucharistic Hymn
    The Church’s oldest Latin Eucharistic hymn is featured in the Brébeuf Hymnal. Indeed, the legendary Father Adrian Fortescue made a translation of it—matching the original’s meter—which was elevated by the Brébeuf team. For years, we’ve been working on a Spanish hymnal: “Cantoral del Padre Antonio Daniel.” The progress has been slow but steady, and we encourage anyone fluent in Spanish to consider joining the proofreading team. A few days ago, my wife helped me record a rehearsal video for this Spanish version of the Church’s oldest Latin Eucharistic hymn.
    —Jeff Ostrowski
    Rare Plainsong Accompaniments
    Our contributor, Veronica Brandt, went deep into Australia to take photographs of organ accompaniments for Gregorian Chant. Some consider these peculiar PLAINSONG ACCOMPANIMENTS—with 3-part harmonies by Barcelona Cathedral organist, Father Josep Muset i Ferrer—to be the rarest in the world. Click here to learn more. Thanks Veronica! 😊
    —Jeff Ostrowski
    “Hidden Chant” • For the Ordinary Form
    If you have carefully examined the gorgeous ORDO MISSAE—in full color—for the Jogues Illuminated Missal, Gradual, and Lectionary, you probably noticed that the Ordinary Form gives several different optional texts for the ASPERGES ME, whereas the 1962 Missale Romanum only has one. One of them is called Effúndam super vos aquam. I always wondered whether Gregorian Chant existed for this antiphon. Well, it turns out the Vatican published a plainsong version of this antiphon in the 1930s: PDF Download (‘Effúndam’). Not even “GregoBase”—which is incredibly comprehensive—knows about this antiphon.
    —Jeff Ostrowski

Quick Thoughts

    “Reader Feedback” • 22 June 2026
    A reader wrote to us from Virginia: “I really appreciate the 23 harmonizations that you posted on CORPUS CHRISTI WATERSHED for the Daily, Daily, Sing to Mary hymn. I hope to find willing voices in our small Schola Cantorum to try the three-voice version. Carry on, sir! You’re doing the Lord’s work.” While we don’t know this gentleman personally, we note that he earned a Ph.D. (which demonstrates that our blog has something for everybody). 😊
    —Corpus Christi Watershed
    Time and Again We Are Asked…
    John Baptist Singenberger (d. 1924) was a central figure of Catholic Church music. In this utterly fascinating excerpt (Single-Page PDF), Singenberger writes: Time and again we are asked: “Is the Gregorian chant to be accompanied by the organ?” As a young student in Saint Gall, Singenberger befriended SEBASTIAN GEBHARD MESSMER, the future Archbishop of Milwaukee (Wisconsin). The two graduated together in 1861. The school they attended (Saint George’s Seminary) was a “seminary”—but in the older European sense. In other words, it provided a classical education without necessarily leading to ordination. Singenberger remained a layman his whole life, but Messmer was eventually made archbishop—by Pope Saint Pius X—of the very archdiocese in Wisconsin where Singenberger would spend his American career, giving him a powerful ecclesiastical ally.
    —Jeff Ostrowski
    “Reminder” — Month of June (2026)
    On a daily basis, I speak to people who don’t realize we publish a free newsletter (although they’ve followed our blog for years). Since we were founded in 2006, not one of our board members has ever accepted any remuneration whatsoever—not a penny. We have no endowment, no major donors, no savings, and refuse to run annoying ads. As a result, our mailing list is crucial to our survival. It couldn’t be easier to subscribe! Just scroll to the bottom of any blog article and enter your email address.
    —Jeff Ostrowski

Random Quote

In the place of liturgy as the fruit of development came fabricated liturgy. We abandoned the organic, living process of growth and development over centuries, and replaced it—as in a manufacturing process—with a fabrication, a banal on-the-spot product.

— ‘Pope Benedict XVI, describing the postconciliar liturgical reforms’

Recent Posts

  • All 150 Psalms (in Latin) • “With Accents”
  • Two Ways to Defile a Hymn • (And How Not To)
  • “Reader Feedback” • 22 June 2026
  • These Photographs Are Utterly Astounding !
  • Public Criticism of Jeff Ostrowski’s Singing Voice • Also: “Dich König loben wir”

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CONTACT • Corpus Christi Watershed

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Corpus Christi Watershed
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