Early this week, thieves broke into the Renoir Museum in Cagnes‑sur‑Mer and stole four paintings by Pierre-Auguste Renoir worth millions of euros in just five minutes. The break‑in involved cutting a fence with an electric knife and using a hacksaw to free the frames.

Europol’s latest report says museum thefts across Europe have become increasingly brazen, swelling in frequency and violence since 2024.

Art detective Arthur Brand, who has spent the last year tracking stolen pieces, warned the BBC that the Louvre jewellery robbery in October set a new benchmark for daring heists. He says, “If thieves can hit the Louvre, they will try other museums, believing they can get high‑value items as easily as they defended the priceless pieces.”

After the Renoir robbery, similar crimes erupted across the continent: a diamond necklace was stolen from a Viennese museum early this month, Bronze Age artefacts were taken from a Spanish archive in four minutes, and several Italian works disappeared in a single night.

The Association for Research into Crimes against Art (ARCA) notes that these incidents favor small, portable items that can be broken out swiftly. Europol’s report points out the shift toward precious metals, gemstones and culturally significant porcelain that melt or sell fast.

Security managers say the challenge is that most museums are housed in historic buildings that cannot easily be fortified. Directors often “never have enough money for security,” focusing instead on new exhibitions. The door between the public and the art is open, making it easier for an armed thief to step in as a visitor. In many cases, the thieves leave before the police arrive, making detection difficult.

In response, Maison des Lumières in Langres commissioned a police audit, now installing enhanced CCTV and new physical barriers. Vienna’s MAK has introduced metal detectors, cloakroom checks and a stricter bag policy. Experts stress the importance of “physical barriers that delay thieves so there is time for the police to arrive” and that any theft should take so long that it would deter repeat offenses.

Even with increased security, the odds remain against recovered stolen art. According to Chris Marinello of Art Recovery International, only 5‑10% of looted pieces ever resurface. In contrast, the Renoir paintings, jagged and unsellable, may be more likely to turn up because “no one will want to buy them,” Brand says.

As museums grapple with new tactics, they must balance openness for the public with the need for secure, time‑buying measures. The legend of ‘open museums’ will have to be re‑imagined amid a wave of high‑speed, weapon‑equipped robbery.