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*Source ledger (continued):*
**CrimeReads — “The Mona Lisa Wasn’t Really That Famous.”** https://crimereads.com/the-mona-lisa-wasnt-really-that-famous-until-it-was-stolen-in-1911/ — Key source for pre-1911 fame context and the progressive celebrity argument; historian James Zug cited; *New York Times* “French Public Indignant” headline; Max Brod and Kafka at empty wall; ships searched.
**The Vintage News — “December 11, 1913.”** https://www.thevintagenews.com/2024/12/11/december-11-1913 — Hotel Tripoli-Italia, Room 20; Poggi authentication; Peruggia arrest date December 11, 1913; Italian exhibition before return to France.
**Wikipedia — Mona Lisa.** https://en.wikipedia.org/wiki/Mona_Lisa — Painting dimensions (77 cm × 53 cm / approximately 30 × 21 inches); sitter identification (Lisa Gherardini); Vespucci 2005 marginal note; Prado copy; 1956 acid attack and rock attack; bulletproof glass installation; 1963 US tour; 1974 Japan tour; Andy Warhol.
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## The Day the Wall Was Empty
Return, finally, to Louis Béroud standing in the Salon Carré on the morning of August 22, 1911, looking at four iron hooks where the painting had been.
He was a painter with a practical purpose in the room. He was not there to participate in a historical event. He was there to do his work. When the hooks were empty, his first reaction was practical: he asked a guard. When the guard’s assumption — the photographer — proved unfounded, his next step was to inquire further. When the inquiry produced no answer, he found the director of security.
The gap between Béroud’s practical inquiry and the eventual realization that the painting had been stolen tells something specific about how institutions process the unexpected. The initial assumption was always that there was an ordinary explanation. The assumption changed slowly, through the elimination of ordinary explanations one by one. By the end of the day, when no ordinary explanation remained, the institution was left with the extraordinary one.