Thomas of Celano, born in the Abruzzo region of Italy around 1185, was among the early followers of Francis of Assisi and is remembered chiefly as his first official biographer, commissioned by Pope Gregory IX in 1228, the year of Francis's canonization, to write the Vita Prima, or First Life, and later a second, expanded life at the request of the Franciscan order's leadership. Those two biographies remain among the most important sources for Francis's life and for the earliest years of the Franciscan movement. Thomas of Celano has traditionally also been credited with composing the Dies Irae, the day of wrath, the great medieval Latin sequence on judgment used for centuries in the Requiem Mass, though modern scholarship regards that particular attribution as uncertain, tracing it no earlier than a late fourteenth century source and noting other candidates proposed for the poem's authorship.
Facts
Disputed
Lifespan or FloruitThe source gives this year as about, its own approximate estimate rather than a fixed date. How Its Legacy Is ContestedThe Dies Irae is traditionally ascribed to Thomas of Celano (about 1190 to about 1260), best known as the biographer of Francis of Assisi commissioned by Pope Gregory IX in 1228 to write the Vita Prima; the Oxford Dictionary of the Christian Church (3rd revised edition, Cross and Livingstone, eds., Oxford University Press, 2005) treats the ascription of the hymn itself as resting on evidence that is late and indirect. 1 Life
Lifespan or FloruitAbout 1190 to about 1260 1 Publications
Notable PublicationThe First Life of Saint Francis, written at the commission of Gregory IX 1 Origins
Place of OriginCelano, in the Abruzzo region of Italy 1 Learn More
Francis's First Biographer
Thomas of Celano is thought to have joined the Franciscan order not long after its founding, becoming one of Francis of Assisi's own companions during the saint's lifetime, though the details of his early life before joining the order are not well documented. His significance rests chiefly on what came after Francis's death in 1226: when Pope Gregory IX canonized Francis in 1228, he commissioned Thomas to write an official life, the Vita Prima Sancti Francisci, completed the same year, which became the foundational account of the saint's life for the wider church.
As the Franciscan order grew and its own internal understanding of Francis's legacy shifted and sometimes became contested in the following decades, Thomas was asked to produce a second, considerably expanded biography, the Vita Secunda, completed around 1247, drawing on testimony from companions who had known Francis personally and adding material the first life had not included. He also wrote a further short work on Francis's miracles. Together these texts, alongside other early Franciscan sources, form the core documentary basis on which nearly all later scholarship on Francis of Assisi depends, and Thomas of Celano's standing in Franciscan history rests securely on that achievement regardless of what is or is not settled about his authorship of other works later attributed to him.
The Uncertain Case for the Dies Irae
The Dies Irae, a Latin sequence describing the day of judgment in stark and vivid imagery, became one of the most famous poems of the medieval church after its adoption into the Requiem Mass, where it was sung at funerals for centuries and later set to music by composers including Mozart and Verdi. Its authorship has traditionally been assigned to Thomas of Celano, an attribution that first appears in a written source from the Franciscan chronicler Bartholomew of Pisa in 1385, more than a century after Thomas's death, rather than in any document contemporary with him.
Modern scholarship treats this gap as reason for real caution, and the attribution to Thomas of Celano is now generally regarded as unproven rather than settled fact, with some scholars proposing other candidates, including the Dominican friar Latino Malabranca Orsini, and others suggesting a Benedictine rather than Franciscan origin for the poem altogether. What is not in dispute is that the Dies Irae belongs to the broader tradition of medieval Latin sequence writing that flourished across monastic Europe from the twelfth century onward, and that whoever wrote it produced one of the most durable pieces of Latin verse the medieval church ever set to music. This entry follows current scholarship in describing the ascription to Thomas of Celano as traditional and disputed rather than as an established fact of his biography.
Cross-Tradition Connections
Works Attributed
Why this is disputed. Franciscan tradition credits Thomas of Celano, Saint Francis's own biographer, with composing the Dies Irae, an attribution first recorded only in the late fourteenth century and widely repeated since as almost universally accepted, though modern scholars increasingly regard it as conjectural rather than established. Latino Malabranca Orsini, a Dominican lector at Santa Sabina, has been proposed as an alternative, and other scholars have suggested Celano only reworked a still earlier hymn already circulating rather than composing the sequence from nothing, since several of its images and phrases echo earlier liturgical poetry.
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