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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 3 of 3” • Guerrero Kyrie for Our Lady

Jeff Ostrowski · August 13, 2021

HE PROJECT IS COMPLETE! Choirmasters find themselves in need of a brief yet powerful KYRIE ELEISON for their volunteer choirs—and there’s no better choice than Father Guerrero’s De Beata Virgine II (1582AD). It’s a gorgeous composition—but that’s not all. For instance, consider its third section (below). A choir director can explain how the thema comes directly from the plainsong, then describe how Guerrero’s counter-melody is “like a mirror-image” of the thema, and is picked up by the various voices. The choirmaster can also show how each voice has “balance”—in the sense that voices beginning with long values will be reversed later on (and vice-versa).

For all three movements: click here.

Here’s the third (and final) movement:

*  PDF Download • SECTION 3 of 3
—Father Guerrero’s “Missa De Beata Virgine II”
—Edition: Roma 1582AD.

Rehearsal videos for each individual voice await you at #59773.

More Interesting Things: Choirmasters who teach this piece can point out the “connection points.” What are connection points? One would be the Soprano, which gives the Alto its note in measure 1, then “connects” again in measure 4. The same thing (between the same voices) happens in measure 7 and measure 11. Another connection point would measure 11 and measure 14 between Tenor and Bass. And there are tons more! In measures 8-9 there is a tiny little “baby stretto” between Alto and Tenor; and the same thing happens between Bass and Alto in measures 11-12. In measure 5 and measure 12, the Alto voices gives their note to the Soprano voices (an octave higher). These are just a few examples you can share with your choir.

What Is A Trope? During the Middle Ages, most of the Mass prayers were troped. As Father Friel reminds us, Sequences were tropes. The Kyrie was troped. The Gloria was troped. The Agnus Dei was troped. Even the readings were troped. The Kyrie which Father Guerrero uses (see above) is called “Kyrie Cum Jubilo.” In the Editio Vaticana, it’s called KYRIE IX. If you don’t know what a Trope is, please scroll to the bottom of this article:

*  Article • “Reform of the Reform” • Eight Lies We Were Told

No More Tropes: On 20 July 1562, during the 22nd Session of the Council of Trent, a commission of seven prelates was appointed to examine the question of liturgical abuses. Among the Postulata nonnullorum patrum circa varios abusus in missis subinductos—(“Petitions by certain Fathers about various abuses introduced into Mass”)—one finds the following: “Let those additions Mariam gubernans, Mariam coronans be removed from the hymn Glória in excélsis; they seem an unbefitting insertion” (source). On 7 January 1575, Father Guerrero’s chapter in Sevilla decreed that henceforth the Roman rite, as reformed by the Council of Trent, is to be used exclusively. This decree rendered obsolete such “troped” Masses as Guerrero’s De beata Virgine (1566) as well as polytextual Masses, such as his Beata Mater (1566). [But those who have attended the Sacred Music Symposium know that the texts can be altered so these Masses can still be used.]

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

Filed Under: Articles, PDF Download Tagged With: 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

    Simplified Accomp. • Schubert’s “Ave Maria.”
    Sometimes the organist must simultaneously serve as the CANTOR. (Those who work in the field of church music know exactly what I’m talking about.) One of our contributors composed this simplified keyboard accompaniment for Franz Schubert’s “Ave Maria,” a piece which is frequently requested for Catholic funerals and weddings. In terms of the discussion about whether that piece is too theatrical (‘operatic’) for use in Church, I will leave that discussion to others. All I know is, many church musicians out there will appreciate this simplified version.
    —Jeff Ostrowski
    “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 in 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

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

“Then, when the later great Germans arrived, Haydn, Mozart, and Beethoven—all secular composers—and tried their hands at sacred music, they set Roman Catholic words to music which in form and spirit is Protestant.”

— Sir Richard Runciman Terry (1912)

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