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The ‘Colores Rhetorici’ in the Investiture Contest

The polemics of the investiture contest, both those of German and those of Italian origin, in most cases owe their survival to the copying activity of scribes in the monasteries and cathedral chapters of Germany during the twelfth century. This survival is in itself unexpected: the Libelli de lite continued to be copied at a period when their argumentation and critical apparatus must have appeared unsophisticated by comparison with the canonical and theological textbooks of the mid-twelfth century. The polemics seem to have been preserved not for their erudition but for their literary qualities. Thus the two most famous twelfth-century collections of eleventh-century libelli — that of the Codex Udalrici and that transcribed in the sixteenth-century codex, Hanover, Niedersächsische Landesbibliothek XI. 671 — are found to exploit the polemics for teaching purposes: not for the elucidation of the rights of King Henry IV or of Pope Gregory VII (as their contents might suggest), but as models of epistolary style for the instruction of the twelfth-century pupils of the cathedral school of Bamberg. ‘Codex I’ of the composite Hanover letter collection — which, like the Codex Udalrici, seems to have originated in Bamberg — contains an important group of pro-Henrician and anti-papal materials: the only extant exemplar of the Defensio Heinrici IV regis of Petrus Crassus, the decrees of the imperialist synods of Worms and Brixen, the encyclical of 1089 of the antipope Wibert of Ravenna, and the treatise of Pseudo-Udalric in favour of clerical marriage. However, ‘Codex I’ also includes pro-papal materials: the two letters of Archbishop Gebhard of Salzburg in support of Gregory VII, letters of Gregory VII himself concerning German ecclesiastical politics, a well-known letter of Urban II and the decrees of the reforming council of Piacenza of 1095. The eclectic nature of the compilation of ‘Codex I’ suggests that the polemical works were regarded by the compiler primarily as model performances in the rhetorical art of the trivium.