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Views from the Choir Loft

“Ad Orientem” Explained

Daniel Tucker · February 13, 2021

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HIS YEAR, the priest at my parish will be offering the Holy Sacrifice of the Mass ad orientem on Fridays during Lent. In parishes that are not used to having Mass offered ad orientem, introducing it at daily Mass on the Fridays of Lent is an excellent way to begin the practice. I wrote the following “explainer” to help my parishioners understand what’s going on and why.

What does “ad orientem” mean?

“Ad orientem” is Latin for “toward the East.” It refers to the direction that the priest faces during particular moments in the Holy Sacrifice of the Mass. Historically, Catholic churches and cemeteries have always been built along an East-West axis whenever possible. This is because the Holy Sacrifice of the Mass is not merely a closed-circle, communal event taking place between the priest and people, but a heavenly mystery encompassing the whole cosmos: “In the earthly liturgy we take part in a foretaste of that heavenly liturgy which is celebrated in the holy city of Jerusalem toward which we journey as pilgrims, where Christ is sitting at the right hand of God…” (Sacrosanctum Concilium, paragraph 8). 

It seems like the priest is facing the wrong way. What’s going on?

During those portions of the Mass that are addressed to the people, the priest faces the people. However, because the Eucharistic prayer is addressed to God the Father, the normal posture of the priest has always been to face with the people toward the Lord while the priest, acting “in persona Christi capitis” (“in the Person of Christ the Head”), re-presents Christ’s saving sacrifice to the Father in an unbloody manner through the power of the Holy Spirit.

Didn’t Vatican II get rid of this?

Actually, no. Nowhere in the documents of Vatican II (nor in any other magisterial documents before or since) has the Church ever directed the priest to face “versus populum” (Latin, “toward the people”) for the entire duration of the sacred liturgy. In fact, the current edition of the General Instruction of the Roman Missal (the priest’s “instruction book” for Mass) presumes the “ad orientem” posture because it directs the priest to turn and face the people at certain points, implying that he had not been facing them beforehand.

What does this mean for me?

While the priest’s “ad orientem” posture may seem unusual at first, with repeated exposure many people find that the “ad orientem” celebration allows them to enter more deeply into the prayer of the Mass and to focus more intently on the mystery of Christ’s Real Presence – Body, Blood, Soul, and Divinity – in the Most Holy Eucharist.

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

Filed Under: Articles Tagged With: Ad Orientem Last Updated: February 13, 2022

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About Daniel Tucker

Daniel Tucker is choirmaster at the Cathedral of St. Matthew in South Bend, IN. He holds degrees from Western Michigan University and Yale University. —(Read full biography).

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President’s Corner

    Luis Martínez Must Go!
    Sevilla Cathedral (entry dated 13 December 1564): The chapter orders Luis Martínez, a cathedral chaplain, to stay away from the choirbook-stand when the rest of the singers gather around it to sing polyphony—the reason being that “he throws the others out of tune.” [Excerpt from “The Life of Father Francisco Guerrero.”]
    —Jeff Ostrowski
    Urgent! • We Desperately Need Funds!
    A few days ago, the president of Corpus Christi Watershed posted this urgent appeal for funds. Please help us make sure we’re never forced to place our content behind a paywall. We feel it’s crucial that 100% of our content remains free to everyone. We’re a tiny 501(c)3 public charity, entirely dependent upon the generosity of small donors. We have no endowment and no major donors. We run no advertisements and have no savings. We beg you to consider donating $4.00 per month. Thank you!
    —Jeff Ostrowski
    “Booklet of Eucharistic Hymns” (16 pages)
    I was asked to create a booklet for my parish to use during our CORPUS CHRISTI PROCESSION on 22 June 2025. Would you be willing to look over the DRAFT BOOKLET (16 pages) I came up with? I tried to include a variety of hymns: some have a refrain; some are in major, others in minor; some are metered, others are plainsong; some are in Spanish, some are in Latin, but most are in English. Normally, we’d use the Brébeuf Hymnal—but we can’t risk having our congregation carry those heavy books all over the city to various churches.
    —Jeff Ostrowski

Quick Thoughts

    Pope Pius XII Hymnal?
    Have you ever heard of the Pope Pius XII Hymnal? It’s a real book, published in the United States in 1959. Here’s a sample page so you can verify with your own eyes it existed.
    —Corpus Christi Watershed
    “Hybrid” Chant Notation?
    Over the years, many have tried to ‘simplify’ plainsong notation. The O’Fallon Propers attempted to simplify the notation—but ended up making matters worse. Dr. Karl Weinmann tried to do the same in the time of Pope Saint Pius X by replacing each porrectus. You can examine a specimen from his edition and see whether you agree he complicated matters. In particular, look at what he did with éxsules fílii Hévae.
    —Corpus Christi Watershed
    Antiphons Don’t Match?
    A reader wants to know why the Entrance and Communion antiphons in certain publications deviate from what’s prescribed by the GRADUALE ROMANUM published after Vatican II. Click here to read our answer. The short answer is: the Adalbert Propers were never intended to be sung. They were intended for private Masses only (or Masses without music). The “Graduale Parvum,” published by the John Henry Newman Institute of Liturgical Music in 2023, mostly uses the Adalbert Propers—but sometimes uses the GRADUALE text: e.g. Solemnity of Saints Peter and Paul (29 June).
    —Corpus Christi Watershed

Random Quote

When Christ gave the bread, he did not say, “This is the symbol of my body,” but, “This is my body.” In the same way, when he gave the cup of his blood he did not say, “This is the symbol of my blood,” but, “This is my blood.”

— Theodore, Bishop of Mopsuestia, writing in the 5th Century

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