Museum of Applied Arts cleared of negligence in diamond heist

An investigation report by security consulting firm LifeLine’s has concluded that the Museum of Applied Arts (MAK) showed no negligence following the armed robbery of a diamond necklace on August 27, 2026.

The 34-page report examined the security measures for the “Masterpieces. Van Cleef & Arpels High Jewelry x Masterpieces from the MAK Collection” exhibition. Experts found that all agreed-upon security standards and contractual obligations were met. The report noted that while metal detectors have been implemented since the incident, they were not required by previous standards.

A key finding was the museum's decision to prioritize personal protection over object protection. By opting against loud alarms and armed security personnel, the museum aimed to prevent direct confrontations, panic, or hostage situations with the armed perpetrators. The report stated that the direct alerting of the police and the security center functioned “optimally and efficiently,” and praised the behavior of Securitas employees.

Despite the presence of 185 video cameras, numerous alarm sensors, special security glass, and trained staff, the report concluded that a professionally executed robbery during regular opening hours could not have been prevented with reasonable effort.