In this book, Umberto Eco addresses the phenomenon of the ugly, which was most often seen as the opposite of the beautiful, but has never been investigated in detail. However, ugly is a much more complex concept than simply denying the various forms of beauty. Is ugliness always a symbol of evil? Why have philosophers for centuries, Artists, Writers have consistently turned to deviations from the norm, Disparities , The Devil's Scheming , The Horrors of Hell , , The suffering of the martyrs and the tragedy of the Last Judgment? What did they want to say with their works? How did contemporaries react to them and how do we perceive these works today? The author analyzes all these problems, illustrating his story with philosophical and literary texts, Poetry , Examples of painting, Sculptures , Cinematography. As a result, ugliness appears here as a human drama. This book will appeal to both fans of Umberto Eco and anyone interested in culture and art.