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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

“Unsolved Mysteries” • What Happened To This Institute?

Jeff Ostrowski · October 11, 2024

HE IMPRESSIVE collection of vernacular plainsong propers known as The O’Fallon Propers was published in the 1960s by SAINT MARY’S INSTITUTE in O’Fallon, Missouri. But what exactly was “SAINT MARY’S INSTITUTE”—and who was in charge of it? From what I can tell, the motherhouse for the Sisters of the Most Precious Blood was located in O’Fallon (just west of St. Louis, Missouri). The SAINT MARY’S INSTITUTE seems to have been intimately connected with Dom Ermin Vitry, OSB, who was born on 22 December 1884 in Lobbes, a village in Belgium. Vitry entered religious life at the magnificent Maredsous Abbey in 1902, one year before the sacred music legislation of Pope Saint Pius X was issued in 1903.1

Dom Ermin Vitry • Dom Ermin Vitry was ordained a Benedictine priest in 1907. At the LEMMENSINSTITUUT, he studied organ with the legendary Edgar Tinel (d. 1912). The Benedictines sent him from Belgium to the United States where he served as director of music for the SAINT MARY’S INSTITUTE—but sources disagree vis-à-vis the precise years this took place. For the record, Monsignor Martin B. Hellriegel served as chaplain for the O’Fallon sisters from 1918-1940. Vitry and Hellriegel knew each other. When the O’Fallon Propers were published, the creators wrote as follows:

The Institute • One source says: “As choir director, Dom Ermin taught the Sisters an appreciation of sacred liturgical music through Gregorian Chant.” In a (very brief) biography of Dom Vitry published in 1988, Monsignor Francis P. Schmitt insinuates that Vitry was the driving force behind what would become the O’Fallon Propers. Monsignor Schmitt wrote: “I am no enthusiast for English chant, never have been. But I recognize a legitimate place for it…” He then went on to say:

“The late Dom Ermin Vitry and the recently deceased Charles Dreisoerner (either of whom forgot more about Gregorian than most pundits I encounter these days will ever know) both felt that, in some measure, the preservation of Gregorian as the song of the faithful, the saving of it from a second and final death, depended upon a viable vernacular use.”

Mysterious • Some people believe that Monsignor Hellriegel was the actual composer of The O’Fallon Propers. One thing is certain: its 483 pages must have been in production for many years before its publication in 1964. I would welcome any information about what remains of SAINT MARY’S INSTITUTE or the Sisters of the Most Precious Blood in O’Fallon.

Here’s a photograph of Dom Ermin Vitry taken circa 1935:

1 This motu proprio was known as “Inter Pastoralis Officii Sollicitudines.” Some people also refer to it by the Italian name: “Tra Le Sollecitudini.”

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

Filed Under: Articles Tagged With: Dom Ermin Vitry, Inter pastoralis officii Pius X, Monsignor Francis P Schmitt, Monsignor Martin B. Hellriegel, O'Fallon Missouri Mass Propers, O’Fallon Propers in Plainsong, Sisters of the Most Precious Blood, The O’Fallon Propers, Tra le sollecitudini, Tra Le Sollecitudini Motu Proprio Last Updated: March 23, 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 • “Organ Accompaniment”
    Over the past few years, I’ve been harmonizing all the vernacular plainsong Introit settings by the CHAUMONOT COMPOSERS GROUP. This coming Sunday—10 May 2026—is the 6th Sunday of Easter (Year A). The following declaration will probably smack of “blowing my own horn.” However, I’d rank this accompaniment as my best yet. In this rehearsal video, I attempt to sing it while simultaneously accompanying myself on the pipe organ. The musical score [for singers] as well as my organ accompaniment can be downloaded free of charge from the flourishing feasts website.
    —Jeff Ostrowski
    “Gregorian Chant Quiz” • 4 May 2026
    A few days ago, the CORPUS CHRISTI WATERSHED Facebook page posted this Gregorian Chant quiz regarding a rubric for the SEQUENCE for the feast of Corpus Christi: “Lauda Sion Salvatórem.” There is no audience more intelligent than ours—yet surprisingly nobody has been able to guess the rubric. Drop me an email with the right answer, and I’ll affirm your brilliance to everyone I encounter!
    —Jeff Ostrowski
    “Rare Photographs” • Hannibal Bugnini
    On 2 September 2025, we included in this article extremely rare photographs of Archbishop Hannibal Bugnini taken in Iran circa 1979. Bugnini had initially been banished by the pope to Uruguay, but he refused to obey. [This is interesting, since Bugnini relied upon ‘blind obedience’ when it came to modifications of the ancient liturgy.] After he refused to obey the order from the pope, Hannibal Bugnini was banished to Iran. You can also watch a short video of Hannibal Bugnini in Iran, dated 10 November 1979. That’s about a week after the USA embassy hostage crisis began in Tehran, and Pope Saint John Paul II had sent the leader of the Iranian Revolution a special letter.
    —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

“No one can reasonably find in the dispositions of Vatican II anything out of order, or any extreme opinions or tendencies which restrict the function of sacred music exclusively to the congregational singing of the faithful or on the other hand which replace or eliminate the singing of the congregation entirely by the singing of the choir.”

— Most Rev’d Archbishop D.M.M. y Gómez, Primate of Mexico (at that time, the world’s largest archdiocese)

Recent Posts

  • PDF Download • “Organ Accompaniment”
  • “Gregorian Chant Quiz” • 4 May 2026
  • “Rare Photographs” • Hannibal Bugnini
  • “Regina Caeli” • More Than You Wanted To Know
  • Music List • “5th Sunday of Easter” (Year A)

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