A tiara, sapphire necklace and the right earring from the sapphire set, which were worn by Queen Marie-Amélie and Queen Hortense, were stolen in the heist. The set is rumored to have first belonged to Queen Marie-Antoinette. The set includes 24 sapphires and 1,083 diamonds, according to the Louvre .

The Louvre, the world's most iconic museum, remained closed Monday after thieves stole priceless treasures from the Apollon Gallery, the home of the French crown jewels.

The theft occurred with visitors already inside, and was among the highest-profile museum thefts in living memory.

One day after four men staged a heist of the Louvre Museum, French officials were looking Monday to find the thieves and the priceless jewels they swiped.

Intruders entered via a basket lift using a platform mounted on a lorry, breaking a window and making off with jewels that "have genuine heritage value and are, in fact, priceless," France's interior minister said.

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.

The crew of chainsaw-wielding thieves who brazenly robbed The Louvre of priceless jewels in the highest-profile museum theft in living memory may have been hired by a collector, officials said. Paris Prosecutor Laure Beccuau said authorities are investigating whether the heist was commissioned by a collector.

The Louvre Museum in Paris remains closed to the public after robbers stole imperial jewels in broad daylight on Sunday.