The Antwerp Diamond Heist

Over the Valentine's Day weekend of February 15–16, 2003, a team of thieves broke into the Antwerp Diamond Centre vault — the most secure diamond storage facility in the world — and made off with an estimated $100 million in diamonds, gold, jewelry, and other valuables, making it one of the largest diamond heists in history. The vault was protected by magnetic locks, seismic sensors, a Doppler radar system, a private security force, and concrete-reinforced walls. The thieves bypassed everything. The lead conspirator, Italian national Leonardo Notarbartolo, had rented an office in the Diamond Centre building for three years under a false identity as a diamond merchant, allowing him to study the vault's security systems in detail. His accomplices used a handmade tool to block the magnetic lock mechanism without triggering alarms. The theft was discovered only on Monday morning when traders arrived to find the vault open and the contents gone. Notarbartolo and four associates were arrested within months, largely through forensic evidence — including a partially eaten salami sandwich and an incriminating videotape found at a forest dump site near Antwerp where the gang had discarded packaging materials. Notarbartolo was convicted and sentenced to 10 years; others received shorter terms. However, the vast majority of the stolen goods were never recovered. Notarbartolo later gave a provocative prison interview claiming the heist was actually an insurance fraud orchestrated by a diamond merchant insider — an allegation that was never proven and which added an extra layer of mystery to an already audacious crime. The case became a benchmark study in high-security vault design, and the Diamond Centre subsequently undertook a complete security overhaul. Where the diamonds went remains one of the great unsolved questions in the history of theft.