The Mysteries of Udolpho (1794) is a Gothic romance novel by Ann Radcliffe, one of the most influential works of its genre. Set in the late sixteenth century, it follows Emily St. Aubert, an orphaned young woman from Gascony, France. After losing her parents, Emily falls into the power of the treacherous Signor Montoni, who imprisons her in the remote castle of Udolpho in the Apennines. Surrounded by mysterious apparitions, dark secrets, and Montoni's ruthless schemes, Emily struggles to preserve her virtue and sanity. Radcliffe skillfully blends terror, sublime landscapes, and rational explanations of the supernatural, shaping Gothic fiction for generations to come.