The Empress Eugénie's crown is exhibited at the Louvre Museum on April 27, 2025 in Paris, France. The world-renowned Louvre museum in Paris was shut on Oct. 19 after several pieces of invaluable jewelry were stolen in a brazen robbery. Zhang Weiguo/VCG via Getty Images

Authorities were racing Monday to reassure the public about security at key cultural sites — and find the jewels stolen from the museum before they can be broken up and melted down.

Museum security concerns rise after the latest Louvre robbery, as experts recall other major art thefts, including the Isabella Stewart Gardner Museum's still-unsolved heist from 1990.

As of Monday, the Louvre Museum in Paris was still closed following the brazen daylight heist that took place on Sunday and resulted in eight missing pieces of Napoleonic jewelry. In a swift robbery,

The Louvre Museum robbery of priceless jewelry may prompt museums worldwide to review their security programs and protocols, according to experts.

NBC Boston spoke to an art theft expert who is also the director of security and chief investigator at the Gardner Museum about the logistics of this heist at the Louvre and what the thieves might be planning to do with the crown jewels. The plot was carried out just 30 minutes after the Louvre opened on Sunday morning.

French authorities raced against the clock Tuesday, intensifying their hunt for the priceless royal jewels stolen from the Louvre, and the thieves whose brazen daylight robbery left the nation reeling.

A minute-by-minute look at the daring Louvre robbery, using maps, photos and video to unravel how one of the world’s most famous museums was breached.

The precious artifacts snatched from Paris’s Louvre Museum on Sunday include an emerald necklace gifted by Napoleon to his second wife and other priceless jewels.