First folio of one of the earliest known treatises on epistolary rhetoric in Old Italian vernacular. Preserved within a bilingual Latin grammar of the late fifteenth century, this short manual was designed to teach letter-writing in the vernacular and combines practical models (salutatio, exordium, epistolary genres) with explicit references to Cicero’s letters. It offers rare and concrete evidence of how the medieval ars dictaminis was reworked in the fifteenth century under the influence of Ciceronian humanism, at the intersection of rhetorical training, language pedagogy, and vernacular prose culture.© Image courtesy of Biblioteca Statale di Lucca