This study examines the possibility that an overlooked Italian tragedy of 1594 served as a source for Shakespeare's Julius Caesar. Drawing on a careful transcription of the Italian text and comparisons with classical authorities such as Appian and Plutarch, the author traces verbal and structural parallels, shared treatment of supernatural portents, and correspondences in key scenes and character portrayals—particularly of Caesar, Brutus, Antony, and Portia. Chapters consider source relationships, scene sequencing, and the play's presence in England, weigh evidence for direct or indirect influence, and argue that a plausible literary connection merits further scholarly attention.