**Sortiraparis.com — “On This Day: September 7, Apollinaire Arrested.”** https://www.sortiraparis.com/en/what-to-visit-in-paris/history-heritage/articles/351380-on-this-day-september-7-in-paris-guillaume-apollinaire-arrested-in-the-mona-lisa-theft-case — Detailed arrest account: detectives Robert and Coste, examining judge Joseph-Marie Drioux, charge “complicity in theft,” registration under birth name Kostrowitsky, La Santé 11th division cell 15, release September 12, poem “To Health” written in cell, September 14 published account in *Paris*.
**Crime Reads — “The Mona Lisa Wasn’t Really That Famous Until It Was Stolen in 1911.”** https://crimereads.com/the-mona-lisa-wasnt-really-that-famous-until-it-was-stolen-in-1911/ — Pre-1911 fame context: historian James Zug on mid-19th century recognition as masterpiece; theft coverage in *New York Times* (“French Public Indignant”); 60 detectives; ships searched; *Action Française* anti-Semitic blame; Max Brod and Franz Kafka at empty wall; “amateur Sherlock Holmeses” in *Times*.
**Britannica — “Why Is the Mona Lisa So Famous?”** https://www.britannica.com/story/why-is-the-mona-lisa-so-famous — Painting history: Leonardo’s sfumato technique; Francis I; Napoleon’s apartments at Tuileries; Louvre since ~1800; Romantic-era writers Gautier and Pater; sitter identity uncertainty; 1911 theft and crowds; 1963 US tour (40,000 visitors daily Washington and New York); 1974 Japan tour; Marcel Duchamp’s 1919 *L.H.O.O.Q.*
**Finestresullarte.info — “The Theft of the Mona Lisa.”** https://www.finestresullarte.info/en/works-and-artists/the-theft-of-the-mona-lisa-when-vincenzo-peruggia-stole-leonardo-s-famous-painting — Recovery detail: Geri letter signed “Leonardo V.,” November 24 date; Poggi arranged December 11 meeting; authentication at hotel and Uffizi; arrest; Uffizi and Borghese Gallery exhibitions before return to France.
**Robert M. Edsel — “100th Anniversary of the Recovery of the Mona Lisa.”** https://www.robertedsel.com/post/2013/12/10/100th-anniversary-of-the-recovery-of-the-mona-lisa — Recovery: Hotel Tripoli room 20, December 10, 1913; Poggi identified painting; 30,000 visitors Florence per New York Times; Poggi’s subsequent WWII work evacuating Florence art treasures.