The Mona Lisa Theft Plot

The Mona Lisa Theft Plot

Date: 1517

Story:
Late in Leonardo's life, while staying at Château du Clos Lucé under the protection of King Francis I of France, rumors circulated that Italian mercenaries plotted to steal the Mona Lisa. The painting, still unfinished, had become a coveted symbol—both artistically and politically.
Leonardo, known for paranoia, kept it in a private salon, hidden behind a false fireplace. The plot allegedly involved agents sent by the Medici, wanting to reclaim what they called “a Florentine treasure.” They attempted to bribe Leonardo’s valet with 200 gold ducats.
When the plan was uncovered, Francis ordered guards around the clock. Leonardo feigned illness and hid the painting in a secret compartment in his bed’s headboard. One night, masked thieves entered through a kitchen cellar—only to find a decoy canvas.
The scandal never went public, but court records mention an "incident of attempted theft" involving “a panel of immense value.” Leonardo later gave the painting to the king, citing "its spirit belongs in peace.”
Some believe this event inspired future heist myths surrounding the Mona Lisa—including its real theft in 1911.

Key Characters:

Leonardo da Vinci
King Francis I
Medici envoys
Leonardo’s valet (unnamed)

Reference:

Letters of Francesco Melzi
Archives of Amboise Royal Court
The Real History of the Mona Lisa by Jean-Pierre Isbouts