De vulgari eloquentia, written by Dante Alighieri in the early 14th century, is a seminal work that discusses the use of vernacular languages in literature, particularly Italian. This text argues for the importance of elevating the vernacular to a literary status equal to that of Latin, which was the dominant language of scholarship and high culture during the medieval period. Dante's work emphasizes the beauty and richness of local languages, paving the way for their acceptance in literary forms and shaping the future of Italian literature.