The well-known Italian semiotician and novelist Umberto Eco discloses for the first time to English-speaking readers the unsuspected richness, breadth, complexity, and originality of the aesthetic theories advanced by the influential medieval thinker Thomas Aquinas, heretofore known principally as a scholastic theologian. Inheriting his basic ideas and conceptions of art and beauty from the classical world, Aquinas transformed or modified these...