In this 1982 study, Franco Cardini examines the legend of Saint Galgano within the broader context of medieval religious culture. Classified as medieval history and religious studies, the volume analyzes the hagiographic tradition surrounding the Tuscan knight who renounced violence and embraced eremitic life. Through textual sources and historical contextualization, Cardini explores themes of sanctity, chivalry, and symbolic conversion, including the motif of the sword in the stone. The work contributes to scholarship on medieval spirituality and the construction of sacred narratives.