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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

Francisco Guerrero Composer

Jeff Ostrowski · June 7, 2021

“Part 2 of 3” • Guerrero Kyrie for Our Lady

This *might* be the most beautiful 45 seconds in music—Father Guerrero’s compositions are truly awe-inspiring!

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Jeff Ostrowski · May 23, 2021

“Part 1 of 3” • Guerrero Kyrie for Our Lady

Now that choirs are beginning to come back…

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Jeff Ostrowski · May 14, 2021

“Easy Polyphonic Agnus Dei” • Part 2 of 3

What is the best way to get your choir singing when they first return? Here are some tips…

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Jeff Ostrowski · August 6, 2020

Allowed or Forbidden? • Parallel Fourths in Renaissance Polyphony

Article Subtitle: “Brave schola director posts live recording from rehearsal.”

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Jeff Ostrowski · April 30, 2020

Can Sacred Music Be Saved? • (How exactly?)

I know of no greater composition than this one—and it was written by a devout Catholic priest.

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Jeff Ostrowski · April 22, 2016

Shocking Parallels By Guerrero

I’ve seen similar passages by Orlando Lassus.

Jeff Ostrowski · April 20, 2016

Benedictus & Hosanna • “Missa Beata Mater”

My friend was in charge of picking music for papal Masses under Pope St. John Paul II.

Jeff Ostrowski · March 12, 2016

PDF Download • Spanish Cathedral Music (1961)

“On Holy Saturday in 1545, while the pope and several cardinals were present, two of the oldest choir members flew at each other during the blessing of the new oils…”

Jeff Ostrowski · March 1, 2016

| Part 1 of 3 | • “Kyrie Eleison” (SATB) within the reach of any choir!

Can Watershed survive? (Part 1)

Jeff Ostrowski · February 23, 2016

Rehearsal Videos • A Resplendent “Agnus Dei” You’ve Never Heard

Can you hear the Canon between Soprano & Tenor?

Jeff Ostrowski · February 3, 2016

Exclusive Interview • Mr. Nancho Alvarez

“I must point out that the content of my site is totally free, granting open access to everyone.” —Nancho Alvarez

Jeff Ostrowski · February 2, 2016

Ridiculously Awesome Sanctus You’ve Never Heard

We are not allowed to sing Tropes in the Extraordinary Form, so I added that text in italics.

Jeff Ostrowski · January 19, 2016

| Part 3 of 3 | • “Kyrie Eleison” (SATB) within the reach of any choir!

Only one word describes Guerrero’s musical genius: fearsome.

Jeff Ostrowski · January 5, 2016

| Part 2 of 3 | • “Kyrie Eleison” (SATB) within the reach of any choir!

By the mighty Francisco Guerrero!

Jeff Ostrowski · December 30, 2015

Which Mass Goes With Which Season?

Unfortunately, many ignore the words of Abbot Pothier, included at the front of the Vatican Edition.

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Corpus Christi Watershed

President’s Corner

    Music List • (5th Sunday of Lent)
    Readers have expressed interest in seeing the ORDER OF MUSIC I created for this coming Sunday, which is the 5th Sunday of Lent (22 March 2026). If such a thing interests you, feel free to download it as a PDF file. Traditionally, this Sunday was called ‘Passion’ Sunday. Starting in 1956, certain church leaders attempted rename both ‘Passion’ Sunday and ‘Palm’ Sunday—but it didn’t work. For example, Monsignor Frederick McManus tried to get people to call PALM SUNDAY “Second Passion Sunday”—but the faithful rejected that. I encourage all the readers to visit the feasts website, where the Propria Missae may be downloaded completely free of charge.
    —Jeff Ostrowski
    Music List • (Holy Thursday, 2026)
    Readers have expressed interest in seeing the ORDER OF MUSIC I created for Holy Thursday, which is 2 April 2026. If such a thing interests you, feel free to download it as a PDF file. I’m not sure I’ve ever heard a more piercingly beautiful INTROIT, and I have come to absolutely love the SATB version of ‘Ubi cáritas’ we are singing (joined by our burgeoning children’s choir). I encourage all the readers to visit the feasts website, where the Propria Missae may be downloaded completely free of charge.
    —Jeff Ostrowski
    “O Escam Viatorum” • (Holy Thursday)
    When I was very young, I erroneously believed the four psalms provided by the 1957 Liber Usualis—for Communion on Holy Thursday—were the “correct” music to sing on that first day of the TRIDUUM SACRUM. Those four psalms are: Psalm 22 (Dóminus regit me et nihil mihi déerit); Psalm 71 (Deus judícium tuum regi da); Psalm 103 (Bénedic ánima méa); and Psalm 150 (Laudáte Dóminum in sanctis ejus). It turns out I was way out in left field! While nothing forbids singing those psalms, many other options are equally valid. Our volunteer parish choir will sing this COMMUNION PIECE (joined by our burgeoning children’s choir) on Holy Thursday during Holy Communion. Needless to say, this will happen after the proper antiphon from the GRADUALE ROMANUM has been sung.
    —Jeff Ostrowski

Quick Thoughts

    “Gregorian Chant Quiz” • 24 March 2026
    How well do you know your Gregorian hymns? Do you recognize the tune inserted into the bass line on this score? For many years, we sang the entire Mass in Gregorian chant—and I mean everything. As a result, it would be difficult to find a Gregorian hymn I don’t recognize instantly. Only decades later did I realize (with sadness) that this skill cannot be ‘monetized’… This particular melody is used for a very famous Gregorian hymn, printed in the LIBER USUALIS. Do you recognize it? Send me an email with the correct words, and I promise to tell everybody I meet about your prowess!
    —Jeff Ostrowski
    PDF Download • “Ubi Caritas” (SATB)
    I remember singing “Ubi Cáritas” by Maurice Duruflé at the conservatory. I was deeply moved by it. However, some feel Duruflé’s version isn’t suitable for small choirs since it’s written for 6 voices and the bass tessitura is quite low. That’s why I was absolutely thrilled to discover this “Ubi cáritas” (SATB) for smaller choirs by Énemond Moreau, who studied with OSCAR DEPUYDT (d. 1925), an orphan who became a towering figure of Catholic music. Depuydt’s students include: Flor Peeters (d. 1986); Monsignor Jules Van Nuffel (d. 1953); Arthur Meulemans (d. 1966); Monsignor Jules Vyverman (d. 1989); and Gustaaf Nees (d. 1965). Rehearsal videos for each individual voice await you at #19705. When I came across the astonishing English translation for “Ubi Cáritas” by Monsignor Ronald Knox—matching the Latin’s meter—I decided to add those lyrics as an option (for churches which have banned Latin). My wife and I made this recording to give you some idea how it sounds.
    —Jeff Ostrowski
    PDF Download • “Holy, Holy, Holy”
    For vigil Masses on Saturday (a.k.a. “anticipated” Masses) we use this simpler setting of the “Holy, Holy, Holy” by Monsignor Jules Vyverman (d. 1989), a Belgian priest, organist, composer, and music educator who ultimately succeeded another ‘Jules’ (CANON JULES VAN NUFFEL) as director of the Lemmensinstituut in Belgium. Although I could be wrong, my understanding is that the LEMMENSINSTITUUT eventually merged with “Catholic University of Leuven” (originally founded in 1425). That’s the university Fulton J. Sheen attended.
    —Jeff Ostrowski

Random Quote

“Iconographic tradition has theologically interpreted the manger and the swaddling cloths in terms of the theology of the Fathers. The child stiffly wrapped in bandages is seen as prefiguring the hour of his death: from the outset, he is the sacrificial victim, as we shall see more closely when we examine the reference to the first-born. The manger, then, was seen as a kind of altar.”

— Pope Benedict XVI (2012)

Recent Posts

  • “Gregorian Chant Quiz” • 24 March 2026
  • “Versions of the Psalter” • Jeff Interviews Top Biblical Scholar: Dr. Mark Giszczak
  • PDF Download • “Ubi Caritas” (SATB)
  • Summer 2026 • “Gregorian Chant Course” at Aquinas College (Nashville, TN)
  • Music List • (5th Sunday of Lent)

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