When thieves broke into a French museum this week and stole four paintings by the famous impressionist Pierre‑Auguste Renoir, the news was not a shock. The four works – valued at millions of euros – were taken in a mere five minutes after the perpetrators cut through a outer fence with an electric blade and a hacksaw.

Europol’s latest warning says the number of museum thefts across Europe has jumped steeply in the last two years. The agency cautions that police are shifted to “bolder, faster attacks” that target high‑value objects such as jewelry, precious metals and culturally significant artefacts.

Art detective Arthur Brand predicts a surge of copy‑cat burglaries after the 2023 Louvre jewellery heist, describing them as “an immediate wake‑up call for museums.” He notes that robs run in only minutes and that thieves may leave before the police are on the scene. The recent Renoir theft is the latest in a string of incidents – from a Vienna museum’s diamond necklace to stolen Bronze‑Age rings in Spain – that shows a clear shift in tactics and targets.

Why are museums being hit? Security experts say the answer lies in infrastructure. Museums often occupy historic buildings with limited space for modern alarm systems, and directors frequently “never have enough money for security,” opting instead to spend on new exhibitions. The vulnerability is compounded by the fact that visitors can slip in as “normal patrons,” and exiting galleries with robust security can be challenging during opening hours.

The take‑away is that no museum can be a fortress. While new cameras and motion sensors are being installed, the core of defense must be “time‑delaying” measures, such as heavy reinforced doors, thicker display case glass or fog‑machines that slow down thieves. These safeguards buy critical minutes for police to arrive, according to Bulut, the head of museum security consulting.

Cost remains the biggest hurdle for small institutions. A mayor of a small French city told Reuters, “We have the national patrimony here, but the budgets are simply not there to support the high‑tech solutions others enjoy.” Yet security firms are adapting, offering seismic sensors that detect vibrations produced by drills and other forced‑entry tools.

Despite the rising trend in Europe, countries such as Sweden have seen little increase in major museum thefts over the past decade, illustrating that local context matters. Still, the global picture shows a need for modern security that recognises the particular constraints of historic exhibitions while remaining publicly accessible.

Additional reporting by Madeleine Lake.