Representations of monsters and the monstrous are common in medieval art and architecture, from the grotesques in the borders of illuminated manuscripts to the symbol of the "green man", widespread in churches and cathedrals. These mysterious depictions are frequently interpreted as embodying or mitigating the fears symptomatic of a "dark age". This book, however, considers an alternative scenario: in what ways did monsters in twelfth-century sculpture help audiences envision, perhaps even achieve, various ambitions? Using examples of Romanesque sculpture from across Europe, with a focus on France and northern Portugal, the author suggests that medieval representations of monsters could service ideals, whether intellectual, political, religious, and social, even as they could simultaneously articulate fears; throughout, he is careful to present the carvings in their physical and social contexts.