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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 · 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.”

Mark Haas · October 20, 2025

A Simple Way to Sing and Notate Organum Harmony

“Organum is a humble addition to Gregorian chant, yet it opens a profound sonic world.”

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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 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

“A much greater source of anxiety to Us is the style of action of those who maintain that liturgical worship should shed its sacred character, who foolishly say we should substitute for sacred items & furnishings ordinary common things in daily use.”

— Pope Saint Paul VI (14 Oct 1968)

Recent Posts

  • Every Artist Needs a Refuge
  • Simplified Accomp. • Schubert’s “Ave Maria.”
  • “The Unselected Hymn” • Do You Recognize It?
  • 2026 Sacred Music Pilgrimage (Washington DC) • With Richard J. Clark
  • “Reminder” — Month of April (2026)

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