This anthology of newly-translated texts covers the single most important branch of medieval literary theory and criticism--the commentary tradition--in one of the most significant periods of its development. Fully annotated with notes and introductions, the selections encompass a wide range of topics--including authorship, ethics, symbolism, biography, poetics, allegory, and semiotics--and represent many important writers--including Dante, Petrarch, Boccaccio, Grosseteste, Abelard, and Peter Lombard.