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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

    2-Voice Arrangement for Lent
    Those seeking a two-voice arrangement for LENT and PASSIONTIDE should click here and scroll down. It’s based on number 775 in the Brébeuf Hymnal, with an enchanting melody written by Kevin Allen (the legendary American composer of sacred music). That text—“Pendens In Crucis Cornibus”—is often used for the Feast of our Lady of Sorrows. That link is important because, in addition to the musical score, it provides free rehearsal videos for each individual voice: something volunteer choirs appreciate!
    —Jeff Ostrowski
    “Sanctus VIII” • Organ Accompaniment
    A few days ago, I composed this organ harmonization for SANCTUS VIII. This Mass is traditionally called Missa de ángelis or “Mass of the angels.” In French, it is Messe de Anges. You can evaluate my attempt to simultaneously accompany myself on the pipe organ (click here) while singing the melody. My parish is currently singing this setting.
    —Jeff Ostrowski
    Music List • (5th Sund. Ordinary Time)
    Readers have expressed interest in perusing the ORDER OF MUSIC I’ve prepared for this coming Sunday, 8 February 2026, which is the 5th Sunday in Ordinary Time (Year A). If such a thing interests you, feel free to download it as a PDF file. You will probably notice it isn’t as ‘complete’ or ‘spiffy’ as usual, owing to some difficulties which took place this week.
    —Jeff Ostrowski

Quick Thoughts

    “Reminder” — Month of Febr. (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
    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

“The Chasuble, or upper garment, represents the purple garment which the soldiers put upon Jesus Christ, and the heavy cross that He carried on His blessed shoulders to Mount Calvary.”

— Guide for the Laity (1875)

Recent Posts

  • 2-Voice Arrangement for Lent
  • Pope Paul VI • “Sacrificium Laudis” (15 Aug 1966)
  • “Sanctus VIII” • Organ Accompaniment
  • PDF Download • Sanctus VIII Organ Accompaniment (“Mass of the Angels”)
  • Gorgeous Image of Monks Singing!

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