Rationale divinorum officiorum

work by Durand

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July 13, 2026

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The Rationale divinorum officiorum (c. 1285–91) is a significant medieval work by Guillaume Durand, a French prelate, canonist, and liturgist. This treatise offers a comprehensive exploration of Christian liturgy and its symbolism, making it a key text on divine worship during the Middle Ages. Durand, who earned a doctorate in canon law, also authored the Speculum iudiciale, an encyclopedic work on canon and civil law concerning court procedure. The Rationale is considered one of his most important liturgical works.1

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Guillaume Durand
Of his liturgical works, the Rationale divinorum officiorum (c. 1285–91), a general treatise on the liturgy and its symbolism, is considered one of the most important medieval books on divine worship. The Speculum was printed at least 39 times between 1473 and 1678, and the Rationale even more.
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Of his liturgical works, the Rationale divinorum officiorum (c. 1285–91), a general treatise on the liturgy and its symbolism, is considered one of the most important medieval books on divine worship. The Speculum was printed at least 39 times between 1473 and 1678, and the Rationale even more.
Read More