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Dies irae

Dies irae (Latin, "Day of Wrath") is the medieval Latin sequence historically appointed to be sung between the Epistle and the Gospel in the Roman Catholic Requiem Mass¹^•². Its name comes from the opening words of its first verse, "Dies irae, dies illa"¹. The text is traditionally ascribed to the Franciscan Thomas of Celano (d. c. 1256), biographer of St. Francis of Assisi, though the attribution rests on late testimony and the manuscript evidence points only to a thirteenth-century, probably Franciscan, origin³^•¹. Set to a syllabic Gregorian chant melody whose best-known element is a descending four-note sequence, the poem entered the requiem liturgy by the Council of Trent, was removed from the funeral Mass by the 1970 reform of the Roman Missal, and survives both in the Tridentine (1962) form of the Mass and as a recurring motif of death and doom in concert works and film scores⁴^•⁵^•⁶.

Key fact	Detail
Genre and position	In the pre-1970 Roman Missal, the Sequence (Prosa de Mortuis) was appointed to be sung between the Epistle and Gospel, after the Gradual and Tractus, in Masses for the Dead²
Pre-1970 prescribed occasions	All Souls' Day, funeral Masses, and anniversary and third-, seventh-, and thirtieth-day requiem Masses¹
Form	57 lines in accentual, rhymed, trochaic meter; 17 triple-rhymed tercets plus a closing section in a different strophic system¹^•⁷
Authorship	Most generally ascribed to Thomas of Celano; ten other names, including Gregory the Great, Bernard of Clairvaux, Bonaventure, and Innocent III, have been proposed¹
Earliest manuscripts	A Naples Franciscan Missal dated 1253–1255 and a copy assigned about 1250; a late-12th-century Caramanico codex ending at the 17th tercet¹^•⁷
Liturgical status	Removed from the funeral Mass by the 1970 missal reform; retained as an optional hymn in the Liturgy of the Hours and in the Tridentine (1962) form⁵^•⁸
Musical afterlife	Plainsong used in religious music from the 16th century and, in Romantic and later secular music, to suggest the macabre, from Berlioz's Symphonie fantastique (1830) to film scores³^•⁹

What the Dies irae is

The Dies irae is a sequence, a genre of rhymed Latin poetry sung after the Gradual in the Mass, not a hymn of the Divine Office in origin, and not a private prayer. In the pre-1970 Roman Missal it was also called the Prosa de Mortuis or Sequentia in Commemoratione Defunctorum, and its rubrics prescribed it on All Souls' Day, in funeral Masses, and in anniversary and third-, seventh-, and thirtieth-day requiem Masses²^•¹. Britannica notes that it once formed part of the office for the dead as well as the requiem Mass³. The Dies irae survived the Council of Trent's purge of most sequences from the Mass, and the present text is already found in a Missale Romanum published in Venice in 1493, from which it spread through Franciscan and Dominican liturgical books⁴^•⁷.

Authorship and origins

The named tradition. Authorship has been most generally ascribed to Thomas of Celano, the friend, fellow friar, and biographer of St. Francis¹. The earliest named testimony is Friar Bartholomew of Pisa, whose Liber conformitatum, written between 1383 and 1390, attests that Thomas "is said to have also composed" the prosa de mortuis sung in the Mass⁷. That is roughly a century after the earliest manuscripts, so the attribution is a tradition rather than a contemporary claim.

The manuscript evidence. A thirteenth-century Franciscan Missal in the Biblioteca Nazionale at Naples contains the sequence; Father Eusebius Clop, O.F.M., argued in 1907 for a date between 1253 and 1255, and a copy in a "Breviary of St. Clare" was assigned about 1250. On this basis the Catholic Encyclopedia judges it very probable that the sequence was composed by a Franciscan in the thirteenth century¹. A separate witness complicates the picture: a codex from Caramanico, now in the National Library of Naples (VII. D. 36) and dated to the late twelfth century, ends precisely with the 17th tercet of the Roman Missal text, suggesting the final six lines were added later for the Mass for the dead. Inguanez, who published that redaction, antedated the sequence's composition to the twelfth century⁷.

Alternative attributions. Ten other names have been suggested by various writers, among them Gregory the Great (d. 604), Bernard of Clairvaux (d. 1153), Bonaventure (d. 1274), and Innocent III¹. The Vatican edition of the plain-chant melody (1907) divides the final six lines into three couplets, taking account of the likelihood that they did not originally belong to the sequence¹. The composition date is reported variously as thirteenth century (on the 1250–1255 manuscripts) and twelfth century (on the Caramanico codex).

Text, structure, and biblical sources

The poem as found in the Roman Missal runs to 57 lines in accentual (non-quantitative), rhymed, trochaic meter, comprising nineteen stanzas: the first seventeen in triple rhymes and the last two in rhymed couplets and assonance¹. A specialist description counts the same material as seventeen ternary stanzas of paroxytone monorhymed octosyllables plus six closing verses in a different strophic system⁷. Britannica instead describes 18 rhymed stanzas (17 tercets and 1 quatrain) with a later anonymous unrhymed couplet ending in "Amen"³, the difference turning on how the closing lines are grouped.

The opening stanza reads:

Dies irae, dies illa, Solvet saeclum in favilla, Teste David cum Sibylla.

("Day of wrath, that day, it will dissolve the age in embers, as witness David and the Sibyl.") Berlioz's Requiem sets the text beginning with these same three lines, confirming the stanza structure¹⁰.

Two movements. The first part (verses 1–7) is an objective description of the Last Judgment, a summary of Christian eschatology in microcosm; the second (verses 9–17) is a passionate appeal to Christ's mercy, citing Mary Magdalene and the Good Thief¹¹. A study of the text's theology divides the 18 stanzas differently: stanzas 1–7 are directed to the audience and stanzas 8–17 to Christ, with the 18th split between both, and the judgment imagery borrows heavily from New Testament apocalyptic literature, including Paul's First Letter to the Corinthians and Matthew 25:40¹². The same study reads the poem as containing both a call for mercy and a call to mercy, the latter framed as the litmus test of salvation through the sheep-and-goats separation of Matthew 25¹². An Orthodox parish account groups the verses as judgment (1–6), God's mercy (7–12), forgiveness for the repentant (13–18), and a final plea for eternal rest¹³.

Biblical sources. Zephaniah (Sophonias) 1:15–16: "Dies irae dies illa... dies tubae et clangoris"¹, and the hymn is described as echoing those words on the day of wrath¹³.

Liturgical history: Trent, Vatican II, and the 1962 Missal

The sequence originated in the thirteenth century and was incorporated into the Requiem in that period¹⁴. At the Council of Trent the Church purged most sequences from its Masses, and the Dies irae survived that purge; its syllabic, text-matched setting is one attribute credited with the survival¹⁵.

The 1970 reform. The Dies irae held its place in the funeral liturgy until the reform of the Roman Missal in 1970 removed it, the revisers preferring the note of paschal hope⁵. The reformed Missal was promulgated by Paul VI's apostolic constitution Missale Romanum of 3 April 1969¹⁶. The revised Liturgy of the Hours retains the text as an optional hymn in the last week of the Church's year⁵. The same council that set the reform in motion also affirmed the chant tradition within which the sequence lives: Sacrosanctum Concilium (1963) directs that Gregorian chant be given pride of place in liturgical services¹⁷.

The Tridentine form. The Dies irae remains the sequence of the Mass for the Dead in the 1962 Missal: hand missals for the Tridentine Requiem print it in full⁸. Under the pre-conciliar rules, a decree of the Congregation of Sacred Rites of 12 August 1854 had permitted choirs to omit stanzas not containing a prayer, but that decree was not included in the 1898–1900 Decreta Authentica S. R. C., implying the whole sequence must be sung or recited¹.

The chant melody

The Dies irae has a more inherently rhythmic structure than practically any other extant example of Gregorian chant, avoiding long melismas in favor of a simple, almost declamatory syllabic style¹⁵. Its best-known element is a descending four-note sequence over which the monks chant the words "dies irae"⁶. The melody is probably older than the text but has always been associated with it¹³, and its theme is related to the antiphon "Ego sum qui sum" of the first psalm of the Easter Nocturn; some authors consider the sequence a trope of the responsory Libera me⁷.

In musical settings

The plainsong melody was used by composers of religious works from the sixteenth century onward, either in its original form or as the basis of polyphonic compositions³. Early polyphony did not automatically include it: Ockeghem's Requiem, written on the death of either Charles VII (1461) or Louis XI (1483), still lacks the Dies irae, showing the sequence was not yet standard in early polyphonic Requiems¹⁴.

The great Requiems. Important dramatic settings include those by Colonna and Bassani, Mozart's Requiem, Cherubini's Requiems in C minor and D minor, the settings in the Requiems of Berlioz and Verdi, and the setting in Gounod's Mors et Vita². Britannica distinguishes two approaches: Mozart and Verdi wrote original music on the text, while other composers used the plainsong itself³.

Romantic and secular uses. During the Romantic period the melody was used, often as parody or to suggest the supernatural or macabre, in secular compositions by Berlioz, Saint-Saëns, and Vaughan Williams³. Berlioz deployed it in his 1830 Symphonie fantastique, in a nightmare of a witch's sabbath; Franz Liszt's 1849 Totentanz (Dance of the Dead) and Verdi's 1874 Messa da Requiem followed⁹.

References

Topic: Encyclopedia › Society and history › Philosophy, religion, and mythology › Religion and spirituality › Ritual, worship, and religious calendars › Catholic liturgy and the Eucharist

Initially written Sep 17, 2026 · Reviewed: Oct 10, 2026 · Edited: Oct 10, 2026; Oct 11, 2026; Oct 25, 2026 · Last review: Oct 10, 2026

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