This volume offers a series of insights into the fascinating topic of errors and false opinions in early modern Europe. It explores the semantic richness of the category of 'error' in a time when such category becomes crucial to European thought and culture. During decades of increasing normativity in the social and religious sphere as well as in the epistemological status of disciplines, recognizing and correcting error becomes an imperative task whose importance can hardly be overestimated. The efforts at establishing religious, political, and scientific orthodoxy led philosophers, doctors, philologist, scientist, and theologians, to reconsider the very foundations of knowledge in the attempt to dispel errors. Spanning geographically from Italy to France, England, and Germany, the articles here gathered provide stimulating glimpses into one of the most fascinating, multifaceted, and controversial aspects of early modern culture.