Reposted from Mental Floss

On August 21, 1911, the Mona Lisa was stolen from Paris’s Louvre Museum. It was a Monday—the museum was closed and security was minimal—and the thief had reportedly spent the weekend plotting the heist while hiding in one of the museum’s closets.

At the time, security at the Louvre was abysmal. There were less than 150 security personnel in charge of guarding 250,000 artifacts, and none of the paintings were bolted to the walls. (The Mona Lisa, for example, hung from four measly hooks.) According to Ian Shank at Artsy, “Months before the heist, one French reporter had spent the night in a Louvre sarcophagus to expose the museum’s paltry surveillance.”

After the painting's disappearance, France’s borders were effectively closed, with officials examining every vehicle crossing the country's eastern border. Media coverage of the heist spread across the globe, turning the little-known painting into a household name. The Paris-Journal offered 50,000 francs for the painting’s return. Soon, a tip from an art thief would cause police to turn their attention toward one of the country’s most promising young artists: Pablo Picasso.

Picasso, who had moved to Paris a decade earlier, lived with a gaggle of Bohemians dubbed la bande de Picasso. Among this crew was the poet and writer Guillaume Apollinaire, whose former secretary was Honore-Joseph Géry Pieret, a Belgian man of questionable morals. Shortly after the Mona Lisa was stolen, Pieret—lured by the possibility of a cash reward—stepped into the Paris-Journal's office and claimed that he had lifted art from the Louvre before and had given the works to "friends."

Pieret was telling the truth. In 1907, he had stolen at least two Iberian sculptures made in the 3rd or 4th century BCE and sold them to Picasso, who paid him 50 francs per piece. (Picasso used these artifacts to inspire his work Les Demoiselles d’Avignon. [PDF]) That wasn't all. According to Nick Mafi at The Daily Beast, Pieret also stole a similar piece from the Louvre in 1911 and placed it on Apollinaire’s mantel.

The police read about Pieret's exploits with great interest. They believed that the people who were in possession of these sculptures might also have the Mona Lisa. And they didn’t have much trouble piecing together who, exactly, the thief's friends were.

Realizing that they were in deep trouble, Picasso and Apollinaire packed the Iberian sculptures into a suitcase and ran off in the middle of the night with plans of throwing the artworks into the river Seine. But when the two artists reached the water, they could not will themselves to dump the statues. Instead, Apollinaire visited the Paris-Journal the next morning, deposited the statues, and demanded that the newspaper give him anonymity. The newspaper agreed ... until the authorities stepped in.

Within days of Apollinaire's visit to the newspaper, the police had detained him. In early September, Picasso was ordered to appear before a magistrate. When asked if he knew Apollinaire, the terrified painter lied. “I have never seen this man,” he replied.

Recalling the events, Picasso said, “I saw Guillaume’s expression changed. The blood ebbed from his face. I am still ashamed.” As the proceedings continued, Picasso wept.

Although both men were indeed in possession of stolen art, the judge determined that the situation had nothing to do with the Mona Lisa’s disappearance and decided to throw the case out. Two years later, both men would be cleared of any possible connection to the crime when police discovered the painting had been stolen by Vincenzo Peruggia, an Italian artist who had been working at the Louvre.

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