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Bio-Bibliographical Guide to Medieval and Early Modern Jurists

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Report No. r286

Guido Tolosanis

fl. early 14th c.


Alternative Names

Guy de Toulouse



Guido produced a partial, vulgar version of the Summa of Johannes of Freiburg that was particularly designed for the use of merchants (Incipit: ‘Universis mercatoribus Tolosanis’). The subjects of just price and usury figure prominently in the treatise. It was later translated into Latin.



No. 1



Text(s) – Manuscripts

No. 1



Latin Version


Berlin, Staatsbibl. theol. lat. 370, fol. 115–22


Cambridge, Gonville & Caius Coll. 122, fol. 1–19


Oxford, Lincoln Coll. 81, fol. 33–41


Paris, BN lat. 10689, fol. 27v–36ra


Text(s) – Early Printed Editions

No. 1


Early Printed Editions

Provins, 1496 (Hain 7378). An abridged version, French Text.



T. Kaeppeli, Scriptores ordinis praedicatorum medii aevi (Roma 1975) 2.74–75.

P. Michaud-Quantin, Sommes de casuistique et manuals de confession au moyen âge (XII–XVI siècles) (Leuven 1962) 48.