Mysterious 'Man in the Iron Mask' Revealed, 350 Years Later

man in the iron mask movie still
A still from the 1939 film about the historical mystery, “The Man in the Iron Mask.”
(Image credit: Edward Small Productions, Courtesy of UCSB)

A 350-year-old French mystery has been unmasked: In his new book, Paul Sonnino, a professor of history at the University of California, Santa Barbara, claims he has uncovered the real identity of the mysterious Man in the Iron Mask.

The Man in the Iron Mask was a prisoner arrested in 1669 and held in the Bastille and other French jails for more than three decades, until his death in 1703. His identity has been an enduring mystery because, throughout his imprisonment, the man's face was hidden by a mask, according to Sonnino. The story was even popularized in the 1998 film "The Man in the Iron Mask," starring Leonardo DiCaprio.

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Kacey Deamer
Staff Writer
Kacey Deamer is a journalist for Live Science, covering planet earth and innovation. She has previously reported for Mother Jones, the Reporter's Committee for Freedom of the Press, Neon Tommy and more. After completing her undergraduate degree in journalism and environmental studies at Ithaca College, Kacey pursued her master's in Specialized Journalism: Climate Change at USC Annenberg. Follow Kacey on Twitter.