The _Poetics_ of Aristotle were badly rendered into Latin, from the faulty paraphrase of Averroes, by one Hermann (1256). The nominalist and realist dispute brought again into the arena the relations between thought and speech, and we find Duns Scotus occupied with the problem in his _De modis significandi seu grammatica speculativa_. Abelard had defined sensation as _confusa conceptio_, and with the importance given to intuitive knowledge, to the perception of the individual, of the _species specialissima_ in Duns Scotus, together with the denomination of the forms of knowledge as _confusae, indistinctae_, and _distinctae_, we enter upon a terminology, which we shall see appearing again, big with results, at the commencement of modern Aesthetic. The doctrine of the Middle Age, in respect to art and letters, may thus be regarded as of interest rather to the history of culture than to that of general knowledge. A like remark holds good of the Renaissance. Theories of antiquity are studied, countless treatises in many forms are written upon them, but no really new Ideas as regards aesthetic science appear on the horizon. We find among the spokesmen of mystical Aesthetic in the thirteenth century such names as Marsilio Ficino and Pico della Mirandola. Bembo and many others wrote on the Beautiful and on Love in the century that followed. The _Dialogi di Amore_, written in Italian by a Spanish Jew named Leone and published in 1535, had a European success, being translated into many languages. He talks of the universality of love and of its origin, of beauty that is grace, which delights the soul and impels it to love. Knowledge of lesser beauties leads to loftier spiritual beauties. Leone called these remarks _Philographia_. Petrarch's followers versified similar intuitions, while others wrote parodies and burlesques of this style; Luca Paciolo, the friend of Leonardo, made the (false) discovery of the golden section, basing his speculating upon mathematics; Michael Angelo established an empirical canon for painting, attempting to give rules for imparting grace and movement to figures, by means of certain arithmetical proportions; others found special meanings in colours; while the Platonicians placed the seat of beauty in the soul, the Aristotelians in physical qualities. Agostino Nifo, the Averroist, after some inconclusive remarks, is at last fortunate enough to discover where natural beauty really dwells: its abode is the body of Giovanna d'Aragona, Princess of Tagliacozzo, to whom he dedicates his book. Tasso mingled the speculations of the _Hippias major_ with those of Plotinus.