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Corpus Christi Watershed

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

Mark Haas • Article Archive

Mark Haas is a composer and speaker whose liturgical music has been sung in over 600 parishes and 10 countries. He lives in Florida with his wife and seven children.—Read full biography (with photographs).

Mark Haas · May 12, 2026

Inspiring Paper from a Graduating High School Senior

Such fantastic scholarship from a young contributor provides hope to our Church.

Mark Haas · April 17, 2026

2026 Sacred Music Pilgrimage (Washington DC) • With Richard J. Clark

This choir pilgrimage is more than a trip—it is a sacred journey.

Mark Haas · March 25, 2026

From Sentiment to Sacrament: Reclaiming Sacred Music for the Wedding Mass

“She could very well be the beauty, but my heavens, what does the groom look like?!”

Mark Haas · March 10, 2026

Music is the “Humble Handmaid” of the Mass

“Upon hearing this, my kids immediately glanced at me with horrified looks on their faces.”

Mark Haas · February 23, 2026

My Response Surprised A Parishioner ‘Upset’ About Latin

We must resist the temptation to justify Latin—or any liturgical practice—based on personal taste.

Mark Haas · February 9, 2026

Solfege Volleyball: A Children’s Choir Game

“The children loved it instantly. The game required focus, teamwork, and listening.”

Mark Haas · January 23, 2026

“We don’t do that anymore.”

Don’t shoot the messenger!

Mark Haas · January 7, 2026

A Simple Way to Utilize Handbells

The method itself is wonderfully simple.

Mark Haas · December 26, 2025

Bing Crosby, Christmas, and Catholicism

He served as an unwitting catechist, introducing a young listener to the language and music of Catholicism.

Mark Haas · December 13, 2025

The “Word of the Father” Chord: Theology and Harmony Meet at Christmas

It is fitting that the most exquisite chord in Adeste Fideles coincides with the most profound line of theology.

Mark Haas · December 3, 2025

PDF Downloads • 5 Simple Palestrina Pieces

A collection of Palestrina works that are not only stunningly beautiful but also surprisingly accessible.

Mark Haas · November 20, 2025

Kid’s Repertoire • 3 Recommendations (Mark Haas)

“My children’s choir absolutely loves this piece.”

Mark Haas · November 10, 2025

What surprised me about regularly singing the Gloria in Latin

“A chorus of groans erupted: ‘Mr. Haaaaaasssss, whyyyy?'”

Mark Haas · November 4, 2025

When Pilgrims Sing, the World Disappears

“Their culture blended into the harmony of the Church. They were no longer citizens. They were Catholic.”

Mark Haas · October 28, 2025

A Practical Method of Projecting Solfege for Chant

“The choristers are not only learning the Propers more quickly but are also internalizing the sound of solfege in relation to Gregorian modes.”

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Corpus Christi Watershed

President’s Corner

    PDF Download • “For Pentecost Sunday”
    Yesterday morning, I recorded myself singing the ENTRANCE CHANT for Pentecost Sunday while simultaneously accompanying myself on the pipe organ. Click here to see how that came out. At the end of the antiphon, there’s a triple Allelúja and I just love the chord at the end of the 2nd iteration. The organ accompaniment—along with the musical score for singers—can be downloaded free of charge at the flourishing feasts website. For the record, the antiphon on Pentecost Sunday doesn’t come from a psalm; it comes from the book of Wisdom.
    —Jeff Ostrowski
    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

Quick Thoughts

    “Thee” + “Thou” + “Thine”
    Few musicians realize that various English translations of Sacred Scripture were granted formal approval by the USCCB and the Vatican for liturgical use in the United States of America. But don’t take my word for it! Here are four documents proving this, which you can examine with your own eyes. Some believe the words “Thine” and “Thou” and “Thee” were forbidden after Vatican II—but that’s incorrect. For example, they’re found in the English translation of the ‘Our Father’ at Mass. Moreover, the Revised Standard Version (Catholic Edition) mentioned in those four documents employs “Thine” and “Thou” and “Thee.” It was published with a FOREWORD by Westminster’s Roman Catholic Archbishop (John Cardinal Heenan).
    —Jeff Ostrowski
    “Reminder” — Month of May (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 Version • “Canon in D” (Pachelbel)
    I published an article on 11 November 2023 called Wedding March For The Lazy Organist, which rather offhandedly made reference to a simplified version I created in 2007 for Pachelbel’s Canon. I often use it as a PROCESSIONAL for weddings and quinceañeras. Many organists say they “hate” Pachelbel’s Canon. But I love it. I think it’s bright and beautiful. I created that ‘simplified version’ for musicians coming to grips with playing the pipe organ. It can be downloaded as a free PDF if you visit Andrea Leal’s article dated 15 August 2022: Manuals Only: Organ Interludes Based on Plainsong. Specifically, it is page 84 in that collection—generously offered as a free PDF download. Johann Pachelbel (d. 1706) was a renowned German organist, violinist, teacher, and composer of over 500 works. A friend of Bach’s family, he taught Johann Christoph Bach (Sebastian Bach’s eldest brother) and lived in his house. Those who read Pachelbel’s biography will notice his connection to two German cities adopted as famous hymn tune names: EISENACH and ERFURT.
    —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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  • “Unfair Characterization” • (But Good Question)
  • “Thee” + “Thou” + “Thine”

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