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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

PDF Download • Sanctus VIII Organ Accompaniment (“Mass of the Angels”)

Jeff Ostrowski · February 12, 2026

ORTY NINE YEARS ago—in 1977 to be exact—Monsignor Francis P. Schmitt famously included several paragraphs in his book (Church Music Transgressed) deriding TLM Catholics of the 1970s. For example, he rebuked those “whose pamphleteers are forever talking about the beauty of Gregorian chant, by which, it turns out, they mean Mass VIII, a piece neither traditional nor all that beautiful.” Mass VIII is often called “Mass of the Angels” (Missa de ángelis)—and CREDO III was often included in it. For instance, cf. the collection by Jean-Baptiste Labelle, a Canadian organist who studied with Thalberg. As a matter of fact, Monsignor Schmitt was incorrect; several movements from Mass VIII are extremely ancient. [More on that momentarily.]

Jeff’s Attempt • Since our congregation is currently singing SANCTUS VIII, I composed the following harmonization which adheres to the modal theories of the LEMMENSINSTITUUT (broadly speaking), with one exception:

*  PDF Download • SANCTUS VIII —Jeff’s harmonization
—Mass VIII is sometimes called “Mass of the Angels” (Missa de Angelis).

Here’s the direct URL link.

My edition follows the official rhythm. In other words, it uses the rhythm that was intended by those who—at the behest of Pope Saint Pius X—created the EDITIO VATICANA. Dom André Mocquereau had a different theory of rhythm. Specifically, Mocquereau believed the ‘stress’ or ‘accent’ or ‘stroke’ of Gregorian Chant should go on the final syllable, just as it does in the French language. For example, consider the way Dom Mocquereau marked GLORIA XV (Dominátor Deus) in his 1904 LIBER USUALIS:

Therefore, we won’t be surprised to observe that Dom Mocquereau modified the Editio Vaticana by adding all kinds of elongations on the final syllables of Latin words. What is slightly surprising, however, is the fact that Mocquereau’s arch-nemesis, Dom Lucien David, adopted these elongations in his 1932 edition. That illustrates how popular the Mocquereau editions had become in the 1930s:

It will be remembered that the official edition (“EDITIO VATICANA”) gives very little indication when it comes to syllabic plainsong. We see that by examining the Nova Organi Harmonia published by the LEMMENSINSTITUUT, which was punctilious in its adherence to the official rhythm:

Dr. Peter Wagner (Commissionis Pontificiæ Gregorianæ Membrum) also follows the official rhythm:

This is perfectly consistent with the original 1883 edition by Abbat Joseph Pothier:

On the other hand, it isn’t absolutely forbidden to add some elongations for syllabic chants; far from it! Abbat Pothier and his Vatican Commission on Gregorian Chant never intended to ‘micromanage’ or ‘control’ with excessive precision how every choir would approach syllabic sections. For instance, notice how Max Springer of Beuron added a slight elongation in his 1914 edition:

Monsignor Franz Nekes (called by some: “The German Palestrina”) did the same thing in his 1906 harmonization:

Indeed, other “pure” Vaticana editions follow suit. The famous Schwann edition of 1906 does. So does the edition by the Alsatian organist and composer, Father Xaver Mathias, who founded the Saint Leo Institute for Sacred Music at Strasburg Cathedral in 1913. This was also the approach I adopted. In other words, I adopted a type of via media which avoids the excessive “stop and go” approach by Dom Mocquereau:

I can see no justification for all those added pauses. (For the record, Mocquereau kept them in the subsequent editions.)

Concluding Thoughts • At the beginning of this article, I said parts of the Missa de ángelis are quite ancient. He who searches for “O Quam Suávis Est” will discover hundreds of the most gorgeous ancient manuscripts:

SANCTUS VIII is a contrafact of the “O Quam Suávis Est” melody.

Here’s yet another example:

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

Filed Under: Articles, PDF Download Tagged With: Carmen Gregorianum, Editio Vaticana, Harmonizations Mass VIII, Mass of the Angels, Messe des Anges, Missa de angelis, Monsignor Francis P Schmitt, Sanctus VIII Last Updated: February 12, 2026

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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

    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 • “Cantus Mariales” (192 pages)
    Andrea Leal has posted an absolutely pristine scan of CANTUS MARIALES (192 pages) which can be downloaded as a PDF file. To access this treasure, navigate to the frabjous article Andrea posted Monday. The file is being offered completely free of charge. The beginning pages of the book have something not to be missed: viz. a letter from Pope Saint Pius X to Dom Pothier, in which the pope calls Abbat Pothier “a man versed above all others in the science of liturgy, and to whom the cause of Gregorian chant is greatly indebted.”
    —Jeff Ostrowski
    Music List • (2nd Sunday of Lent)
    Readers have expressed interest in seeing the ORDER OF MUSIC I created for this coming Sunday, which is the 2nd Sunday of Lent (1 March 2026). If such a thing interests you, feel free to download it as a PDF file. This feast has magnificent propers. Its somber INTROIT is particularly striking—using a haunting tonality—but the COMMUNION with its fauxbourdon verses is also quite remarkable. I encourage all the readers to visit the feasts website, where the Propria Missae may be downloaded completely free of charge.
    —Jeff Ostrowski

Quick Thoughts

    Extreme Unction
    Those who search Google for “CCCC MS 079” will discover high resolution images of a medieval Pontificale (“Cambridge, Corpus Christi College, MS 079”). One of the pages contains this absolutely gorgeous depiction of the Sacrament of Extreme Unction.
    —Corpus Christi Watershed
    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

“It is the same Church which has introduced the vernacular into the sacred liturgy for pastoral reasons, that is, for the sake of people who do not know Latin, which gives you the mandate of preserving the age-old solemnity, beauty and dignity of the choral office, in regard both to language, and to the chant.”

— Pope Saint Paul VI (15 August 1966)

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  • Fulton J. Sheen • “24-Hour Catechism”
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