The museum, located in Wingen-sur-Moder, northeastern France, is dedicated to French jeweller and glassmaker René Lalique (1860-1945), and was targeted by a break-in in the early hours of 5 July.
A group of masked thieves entered the museum by forcing a door open and heading to the jewellery room. Around 20 pieces of jewellery were stolen, French media have reported, with the loss close to €4 million ($AUD6.57 million).
Police are reviewing CCTV footage, and staff have identified the stolen items. Named after the French jeweller, the museum exhibits Art Nouveau and Art Deco jewellery alongside his creations.
Musée Lalique opened in July 2011 and houses around 650 works that trace the careers of Lalique and his successors, including jewellery, crystal, glass, perfume bottles, and drawings.
The museum stated on social media that it will remain closed for several days to ensure a safe reopening.
“The museum will remain closed over the coming days in order to prepare for a smooth and safe reopening for its staff and visitors,” it said.
“The Lalique Museum team would like to thank everyone involved for their professionalism.”
This burglary occurred less than a year after a jewellery heist at the Louvre Museum in Paris, during which thieves stole $USD102 million ($AUD146 million) in jewellery.
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