The Sunday theft from the Louvre Museum of eight priceless pieces of jewelry belonging to Emperor Napoleon and his wife has ignited a national outcry and nationwide manhunt.French President Emmanuel Macron called the crime "an attack on a heritage that we cherish because it is our history,

The Louvre museum in Paris announced it would remain closed Monday as investigations continue into Sunday’s extraordinary theft of historic jewelry – and experts say the prospects of recovering the treasures are slim.

The masked gang, who remain at large, made off with nine items, including a crown, a tiara, necklaces and earrings.

Masked thieves stole priceless jewels from the Louvre on Sunday morning. The Paris museum has suffered a string of successful art heists, dating back to the theft of the Mona Lisa in 1911.

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.

A new video has emerged showing what could be the Louvre thieves in action as they carried out Sunday’s daylight robbery at Paris’s world-famous museum. The footage, obtained by French broadcaster BFMTV, purportedly shows what has been called one of the most brazen art thefts in recent memory.