No, the film The Wonder is not based on a true story.
Delving into the Narrative of 'The Wonder'
While The Wonder presents a richly detailed narrative set in a distinctive time and place, meticulously recreating an era and its inhabitants, its core story is entirely fictional. The film's profound historical atmosphere and specific character portrayals might lead many to believe it's derived from real events or historical accounts.
However, the narrative crafted within The Wonder is a work of fiction. Its evocative setting and detailed recreation of historical elements serve to create an immersive cinematic experience rather than to recount actual historical occurrences or figures. Despite the realistic feel achieved through its production design and period accuracy, the plot and its developments are original and not based on true events.