Celtic Usages

In Brief

There was no "Celtic rite". That is the governing fact of this entry, and the catalog files it with the note "not a single rite".¹ What survives is a handful of witnesses, overwhelmingly Irish: the Stowe Missal of about 792 — a libellus missarum, a little Mass-book, not a full missal or sacramentary — the Antiphonary of Bangor of 680–691 — an Office and hymn collection, not a Mass book — the Irish Liber Hymnorum, and the pocket gospel-books of Mulling, Dimma and Deer with their orders for communion and the sick.²³⁴⁵ Their core Mass material is Roman, with insular and Gallican/Spanish colouring — not the liturgy of an independent church, and not a survival from before Rome.⁶¹

Where to Experience It

The Shape of the Liturgy

The shape of the Irish Mass is best seen in the Stowe book. Its Mass core is Roman — the Canon headed, in the literature, with an ascription to Pope Gelasius — with Irish litanies and Irish additions, and the book carries Old Irish rubrics alongside the Latin.² The Bangor antiphonary shows the monastic Office: hymns, collects and canticles, with the Sancti venite — the communion hymn that is the book's most famous text.³⁷ The pocket books show pastoral practice at its smallest scale: orders for the communion of the sick and the visitation of the sick, copied into gospel-books carried by hand.⁵ Nothing here is uniform across "the Celtic world": Irish, Welsh, Scottish and Breton practice must not be homogenised, and the evidence outside Ireland is minimal — Deer, a few Welsh and Breton scraps.¹

History

The Irish church was Latin and in communion with Rome from its beginnings — that is Gougaud's firm Catholic synthesis, and the modern scholarship agrees.¹ The famous quarrel came at Whitby in 664: Bede's account (III.25–26) shows a dispute over the date of Easter and, secondarily, the tonsure, with Oswiu deciding for the Petrine reckoning and Colman withdrawing with those who would not accept it.⁸ Nothing in Bede's chapters concerns the order of Mass, and Whitby bound Northumbria — not "the Celtic Church".⁸ Corning's modern study shows why the Easter controversy was not a schism.⁹

The usages ended the way most local usages ended: by reform, not by suppression. The twelfth-century Irish reform synods reorganised the Irish church on Roman lines, and the Synod of Cashel in 1172 — convened under Henry II — ordered in its seventh decree that all divine offices be conducted "after the pattern of the Church of England": juxta quod Anglicana observat ecclesia.¹⁰ That is Giraldus's report, and its liturgical sense is English — Sarum-type — usage within the Roman rite, completing the romanising work already done.¹⁰ Cashel was not the "end of the Celtic rite", because there was no Celtic rite to end: it was the completion of a reform.

The idea of an independent "Celtic Church" is a sixteenth- to nineteenth-century polemical construct. Warren's 1881 classic still carries a chapter section titled "Its Independence of Rome" — a period piece, to be read critically — and his "Eastern Connection" belongs to the same nineteenth-century search for exotic origins.⁶ The corrective is Jane Stevenson's hundred-page introduction to the 1987 second edition, and O'Loughlin's dismantling of "Celtic Christianity" as a separate religion.⁶¹¹ The defensible term, and the one the Index uses, is "early Irish (and insular) usages".

Milestones

1. 664The Synod of Whitby decides for the Roman Easter and tonsure — a calendrical and disciplinary decision, not a change of Mass⁸
2. 680–691The Antiphonary of Bangor — Office hymns, collects and canticles, with the Sancti venite³
3. c. 792The Stowe Missal (RIA D ii 3), probably Tallaght — a libellus missarum with the Irish 'Tract on the Mass'²
4. 1172The Synod of Cashel orders all divine offices 'juxta quod Anglicana observat ecclesia' — English usage within the Roman rite¹⁰

Texts & Books

The Stowe Missal's standard edition is Warner's HBS volumes (1906, 1915): facsimile, introduction, printed text, and the appendix translating the Irish "Tract on the Mass".² The Antiphonary of Bangor was edited by Warren (HBS, 1893–95), with Curran's 1984 study as the modern treatment of the office.³⁷ The Liber Hymnorum is Bernard and Atkinson's HBS edition (1898), Latin and Irish hymns with translations.⁴ The Book of Deer is Stuart's 1869 Spalding Club edition, with Forsyth's 2008 studies as the modern companion; the manuscript itself is fully digitised at Cambridge.⁵ The best modern treatment of the Stowe Mass is O'Donoghue's Eucharist in Pre-Norman Ireland (2011).¹² And Bede's Whitby chapters should be read with Corning (2006) for the controversy in context.⁸⁹

Family & Relations

The Irish usages descend from the Roman Rite at their core, with the colouring of the non-Roman West: Gallican and Spanish elements worked into a Roman skeleton.⁶¹ That is the same family the Gallican entry describes — and the honest formulation for both is that "Eastern" or "Spanish" features reflect a common late-antique stock, not a founding transplant.¹³ The usages' end points them toward England: Cashel's decree made English — Sarum-type — usage the Irish pattern, which is why the Sarum entry sits beside this one.¹⁰ And the modern "Celtic" products — the spirituality books, the reconstructed liturgies — are modern compositions: the Index describes such groups as they describe themselves, not as a rite.

Compare with

• Gallican Rite: the other non-Roman Western family whose colouring the Irish books show¹³
• Sarum Use: the English use that Cashel 1172 made the Irish pattern¹⁰

The Rite Today

There is no living Celtic liturgy. What travels under the name "Celtic" today is modern composition — spirituality products, reconstructed services — and this entry does not present them as the liturgy of the early Irish church. The real survival is in the books: the Stowe Missal on Irish Script on Screen, the Book of Deer fully digitised at Cambridge, the Bangor antiphonary in print.²⁵³ The Irish usages live now where the Gallican and Sarum usages live: in manuscripts, editions, and honest scholarship.

Disputed Questions

Go Deeper

The Celtic entry is the Index's standing warning against a whole way of writing liturgical history. The nineteenth century wanted the Irish to be independent of Rome, or Eastern in origin, or both; the witnesses wanted none of it.⁶ The Stowe Mass is Roman at the core. Whitby was about Easter. Cashel was about English observance.²⁸¹⁰ And the four peoples of the "Celtic world" did not share one rite — the evidence outside Ireland barely fills a shelf.¹ What the Irish books actually show is something more interesting than independence: a Latin, Roman-rooted church at the edge of the world, working Gallican and Spanish colouring into its Mass, writing its rubrics in Old Irish, and carrying its communion orders in pocket gospel-books.²⁵ That is not a separate church. It is the Roman Rite, far from Rome, made local — which is what a "use" is.

## Sources

• Warner, George F. (ed.), The Stowe Missal, MS. D II 3 in the Library of the Royal Irish Academy, Dublin, HBS 31–32 (London, 1906, 1915) — the standard edition; a libellus missarum, with the Irish "Tract on the Mass".
• Warren, F. E. (ed.), The Antiphonary of Bangor, HBS 4, 10 (London, 1893, 1895) — Office hymns, collects and canticles; not a Mass book.
• Bernard, J. H., & R. Atkinson (eds), The Irish Liber Hymnorum, HBS 13–14 (London, 1898) — Latin and Irish hymns, with translations.
• Stuart, John (ed.), The Book of Deer (Aberdeen: Spalding Club, 1869) — the order for the communion of the sick and the Gaelic notes.
• Bede, Historia ecclesiastica III.25–26 — Whitby: Easter and the tonsure, nothing on the order of Mass.
• Giraldus Cambrensis, Expugnatio Hibernica I.35, in Dimock (ed.), Opera vol. V (Rolls Series 21, 1867), p. 283 — Cashel 1172: juxta quod Anglicana observat ecclesia.
• Warren, F. E., The Liturgy and Ritual of the Celtic Church (Oxford: Clarendon, 1881); 2nd ed. with Jane Stevenson's introduction (Woodbridge: Boydell, 1987) — read the introduction as the corrective.
• Gougaud, Louis, "Celtiques (Liturgies)", DACL t. II.2, cols 2969–3032 (1910) — the best short survey.
• Jenner, Henry, "The Celtic Rite", The Catholic Encyclopedia vol. 3 (1908) — the 1908 summary.
• O'Donoghue, Neil Xavier, The Eucharist in Pre-Norman Ireland (Notre Dame: UNDP, 2011) — the best modern treatment of the Stowe Mass.
• O'Loughlin, Thomas, Celtic Theology (London: Continuum, 2000) — dismantles "Celtic Christianity" as a separate religion.
• Corning, Caitlin, The Celtic and Roman Traditions (New York: Palgrave Macmillan, 2006) — the Easter controversy in context.
• Curran, Michael, The Antiphonary of Bangor and the Early Irish Monastic Liturgy (Blackrock: Irish Academic Press, 1984) — the modern study of the office.

On Domus Dei

• The Gallican Rite
• The Sarum Use
• The Roman Rite

Official resources

• The Book of Deer — fully digitised (Cambridge UL MS Ii.6.32)
• The Stowe Missal — Irish Script on Screen (RIA)

Recommended reading

• Warren, F. E., The Liturgy and Ritual of the Celtic Church, Oxford: Clarendon Press, 1881.Read the introduction as the corrective.
• O'Donoghue, Neil Xavier, The Eucharist in Pre-Norman Ireland, Notre Dame: University of Notre Dame Press, 2011.The best modern treatment of the Stowe Missal.
• Warner, George F. (ed.), The Stowe Missal, MS. D II 3 in the Library of the Royal Irish Academy, Dublin, London: Henry Bradshaw Society, 1906.The standard edition, free.
• Gougaud, Louis, “Celtiques (Liturgies)”, Dictionnaire d'archéologie chrétienne et de liturgie, t. II.2, Paris: Letouzey et Ané, 1910.The best short survey, free.
• Bede, Historia ecclesiastica gentis Anglorum, III.25-26 (the Synod of Whitby).Whitby in context. Read online

Sources

1. ScholarshipGougaud, Louis, “Celtiques (Liturgies)”, Dictionnaire d'archéologie chrétienne et de liturgie, t. II.2, Paris: Letouzey et Ané, 1910.Verified 2026-09-14 · Seen (review): cols 2969-3032, signed 'L. GOUGAUD.' The best short scholarly survey, in ten sections from Définition to Bibliographie
2. Primary textWarner, George F. (ed.), The Stowe Missal, MS. D II 3 in the Library of the Royal Irish Academy, Dublin, London: Henry Bradshaw Society, 1906.Verified 2026-09-14 · Seen (review): HBS 31 (facsimile, 1906) and HBS 32 (introduction, printed text, and the appendix 'Translation of the Irish Treatise on the Mass'). The manuscript (RIA D ii 3, c. 792, probably Tallaght) is a 'libellus Missarum' rather than a missal or a true sacramentary
3. Primary textWarren, F. E. (ed.), The Antiphonary of Bangor: An Early Irish Manuscript in the Ambrosian Library at Milan, London: Henry Bradshaw Society, 1893.Verified 2026-09-14 · Catalogued (citation): HBS list (HBS 4 facsimile 1893; HBS 10 text and notes 1895). Office hymns, collects and canticles from Milan, Ambrosiana C. 5 inf. (680-691), with the Sancti venite. Not a Mass book
4. Primary textBernard, J. H., and R. Atkinson (eds), The Irish Liber Hymnorum, London: Henry Bradshaw Society, 1898.Verified 2026-09-14 · Catalogued (citation): HBS list (HBS 13-14). Latin and Irish hymns from TCD and Franciscan manuscripts, with translations. Not opened
5. Primary textStuart, John (ed.), The Book of Deer, Aberdeen: Spalding Club, 1869.Verified 2026-09-14 · Catalogued (citation): archive.org metadata. Includes the fragment of an order for the communion of the sick and the Gaelic notes. The manuscript (Cambridge UL Ii.6.32) is fully digitised
6. ScholarshipWarren, F. E., The Liturgy and Ritual of the Celtic Church, Oxford: Clarendon Press, 1881.Verified 2026-09-14 · Seen (review): the 1881 contents line '§ 4. Its Independence of Rome … 29' — a 19th-c. framing, to be read critically. The classic collection of texts; read Jane Stevenson's c. 100-page introduction to the 1987 2nd ed. as the corrective
7. ScholarshipCurran, Michael, The Antiphonary of Bangor and the Early Irish Monastic Liturgy, Blackrock, Co. Dublin: Irish Academic Press, 1984.Verified 2026-09-14 · Catalogued (citation): ISBN 0716503387. The modern study of the Bangor office. Not opened
8. Primary textBede, Historia ecclesiastica gentis Anglorum, III.25-26 (the Synod of Whitby). LinkVerified 2026-09-14 · Seen: the dispute is over the date of Easter and, secondarily, the tonsure. Oswiu decides for the Petrine/Roman reckoning. Nothing in III.25 concerns the order of Mass
9. ScholarshipCorning, Caitlin, The Celtic and Roman Traditions: Conflict and Consensus in the Early Medieval Church, New York: Palgrave Macmillan, 2006.Verified 2026-09-14 · Catalogued (citation): Open Library OL8717305W. The Easter/tonsure controversy in context, and why it was not a schism. Not opened
10. Primary textGiraldus Cambrensis, “Expugnatio Hibernica I.35 (the Synod of Cashel, 1172)”, Giraldi Cambrensis Opera vol. V, ed. J. F. Dimock (Rolls Series 21, 1867), p. 283, 1867.Verified 2026-09-14 · Seen: Giraldus's report of Cashel's seventh decree ordering all divine offices to be conducted 'juxta quod Anglicana observat ecclesia'. Its liturgical sense is English (Sarum-type) usage within the Roman rite, completing the romanising work of the 12th-c. Irish reform synods
11. ScholarshipO'Loughlin, Thomas, Celtic Theology: Humanity, World and God in Early Irish Writings, London: Continuum, 2000.Verified 2026-09-14 · Catalogued (citation): Open Library OL8168223M. Dismantles 'Celtic Christianity' as a separate religion. Not opened
12. ScholarshipO'Donoghue, Neil Xavier, The Eucharist in Pre-Norman Ireland, Notre Dame: University of Notre Dame Press, 2011.Verified 2026-09-14 · Catalogued (citation): ISBN 9780268037321. The best modern treatment of the Stowe Missal, the tract, the penitentials and the archaeology. Not opened
13. ScholarshipSmyth, Matthieu, La liturgie oubliée: la prière eucharistique en Gaule antique et dans l'Occident non romain, Paris: Cerf, 2003.Verified 2026-09-14 · Catalogued (citation): BnF cb38984034z. The leading modern reconstruction of the Gallican eucharistic prayer, placed within a wider non-Roman Western family; the Gallican prayers are Latin compositions of the 5th-7th c., indigenous and locally diverse. Not opened