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Bio-Bibliographical Guide to Medieval and Early Modern Jurists

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Report No. r181

Extravagantes Communes



Alternative Names



A collection of seventy-four decretals dating from 1295–1483. This collection was made by Jean Chappuis. He completed an early version including only seventy decretals in 1500, and the final version with four additional decretals in 1503. Chappuis included the Extravagantes communes with his Corpus iuris canonici. This work did not circulate widely until it was included in the Editio Romana of 1582. This collection includes Boniface VIII’s famous decretal, Unam sanctam.


S. Di Paolo, ‘Le Extravagantes Communes nell’età dell’incunabolo: la Bolla Unam sanctam da Francesco Pavini a Jean Chappuis’, ZRG Kan. Abt., 122 (2005) 355–407.

J. Brown, ‘The Extravagantes communes and its Medieval Predecessors’, A Distinct Voice: Medieval Studies in Honor of Leonard E. Boyle, O.P., J. Brown and W. Stoneman, ed. (South Bend 1997) 373–436.

J. Muldoon, ‘Boniface VIII as Defender of Royal Power: Unam sanctam as a Basis of the Spanish Conquest of the Americas’, Popes, Teachers and Canon Law in the Middle Ages, J. Sweeney and S. Chodorow, ed. (Ithaca 1989).