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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

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

Jeff Ostrowski · May 23, 2021

OW THAT CHOIRS are beginning to return—since the government is starting to lift the harsh Covid-19 restrictions they imposed—many directors are looking for pieces to “start out with.” Many great composers wrote settings of the KYRIE ELEYSON in three movements, but did you know it’s not required to sing all three movements at first? We often learn the third movement first, adding a plainsong “Christe” in the middle until we learn the other parts. That makes it: (A) polyphonic Kyrie; (B) plainsong Christe; (C) repeat polyphonic Kyrie. Needless to say, as soon as possible we learn the missing movements.

Here’s section 1 of 3:

*  PDF Download • Part 1 of 3
—We sing the first section, then a plainsong “Christe,” then repeat the polyphonic section.

Rehearsal videos for each individual voice await you at #63627. Notice you have to scroll all the way to the bottom of that page. When I finish all three movements, it will be moved to the top.

Teach Your Choirs This :

This little movement is an excellent way to demonstrate how polyphonic composers based their settings on Gregorian chant. Here is “Kyrie IX” (a.k.a. In Festis Beatæ Mariæ Virginis). Notice the shape of the melody:

In his polyphonic setting of Missa De Beata Virgine II (composed in 1582AD), Guerrero masterfully uses that “motif” or “thema” or “subject”—whatever you want to call it:

Update:

My choir sang the first section very well — now they are eager to learn the other sections! Please stay tuned.

Opinions by blog authors do not necessarily represent the views of Corpus Christi Watershed.

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Filed Under: Articles, PDF Download Tagged With: Easy Polyphony For Amateurs, Francisco Guerrero Composer, Missa De Beata Virgine II, Piecemeal Polyphony Last Updated: February 26, 2022

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About Jeff Ostrowski

Jeff Ostrowski holds his B.M. in Music Theory from the University of Kansas (2004). He resides with his wife and children in Michigan. —(Read full biography).

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Corpus Christi Watershed

President’s Corner

    “Reminder” — Month of April (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). 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
    Simplified Accompaniment (Easter Hymn)
    Number 36 in the Brébeuf Hymnal is “At the Lamb’s high feast we sing,” an English translation for Ad Cenam Agni Próvidi (which was called “Ad Régias Agni Dapes” starting 1631). As of this morning, you can download a simplified keyboard accompaniment for it. Simply click here and scroll to the bottom. Many organists are forced to serve simultaneously as both CANTOR and ACCOMPANIST. In spite of what some claim, this can be difficult—which explains why choirmasters appreciate these simplified keyboard accompaniments. Sadly, many readers will click that link but forget to scroll to the bottom where the simplified PDF file is located.
    —Jeff Ostrowski
    PDF Download • “Quasi Modo Sunday”
    The Introit for “Quasi Modo Sunday” (12 April 2026) is particularly beautiful. The musical score can be downloaded as a PDF file, and so can the organ accompaniment. The official language of the Catholic Church is Latin (whereas Greek is our mother tongue). Vatican II said Gregorian Chant must be given “first place” under normal circumstances. As a result, some parishes will rightly sing the authentic version. On the other hand, because so many USA dioceses disobey the mandate of Vatican II, some musicians sing plainsong in the vernacular. I have attempted to simultaneously accompany myself on the pipe organ while singing the English version. Although very few take advantage of it, the complete Proprium Missae is posted at the flourishing feasts website.
    —Jeff Ostrowski

Quick Thoughts

    PDF Download • “Anima Christi”
    I received a request for an organ accompaniment I created way back in 2007 for the “Anima Christi” Gregorian Chant. You can download this PDF file which has the score in plainsong followed by a keyboard accompaniment. Many melodies have been paired with “Anima Christi” over the centuries, but this is—perhaps—the most common one.
    —Jeff Ostrowski
    PDF • “Liturgical Law” (467 Pages)
    On Good Friday during the middle ages, the pope privately recited THE ENTIRE PSALTER. If you don’t believe me, see for yourself by reading this passage by Dom Charles Augustine Bachofen (d. 1943). His famous book—called “Liturgical Law: A Handbook Of The Roman Liturgy”—was published by the Benjamin Herder Book Company, which was the American arm (operating out of St. Louis, Missouri) of one of the world’s most significant Catholic publishers. Dom Charles Augustine Bachofen was born in Switzerland but spent his career between the Benedictine monasteries at Conception (Missouri) and Mount Angel (Oregon). His 1931 masterpiece, Liturgical Law can be downloaded as a PDF file … 467 pages!
    —Jeff Ostrowski
    “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

Random Quote

“It is difficult to imagine a more unjust situation than abortion, and it is very difficult to speak of obsession in a matter such as this, where we are dealing with a fundamental imperative of every good conscience—the defense of the right to life of an innocent and defenseless human being.”

— Pope St. John Paul II

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