French museums are facing a wave of brazen thefts that has exposed just how vulnerable their treasures really are. When thieves scaled a balcony at the Louvre on October 19 and escaped with crown jewels worth tens of millions of dollars, it seemed like a once-in-a-lifetime heist. But within hours, the mayor of the small town of Langres got a call: their own museum, the Maison des Lumières Denis Diderot, had been robbed overnight, its display of historic gold and silver coins smashed open and emptied, the Wall Street Journal reported.

Brazen robberies expose weak security

The Louvre raid was only one of nine museum heists in France over the past year, with five museums hit since the beginning of September alone, some more than once. Targets range from the grand Museum of Natural History i

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