Antwerp, Belgium holds an outsized place in global crime history—not for organized syndicates or street violence, but for a single night in February 2003 that would become a masterclass in precision theft.

On the evening of February 15, 2003, five criminals executed what law enforcement would later call 'the heist of the century.' Over the course of hours, they stole more than $100 million in loose diamonds, gold, silver, and fine jewelry from the vault beneath the Antwerp Diamond Centre. Much of that loot has never been recovered, making the case a rare convergence of audacity, planning, and mystery that transcends national borders.

The Antwerp Diamond District handles approximately 85% of the world's rough diamonds and 50% of all polished diamonds. It is, in essence, the financial heartland of the global diamond trade—a concentration of wealth that makes it simultaneously a jewel and a target. Security was considered impenetrable. It wasn't.

The operation's architect was Leonardo Notarbartolo, an experienced Italian burglar with a reputation for social engineering and methodical planning. Rather than attempt a direct assault on the vault, Notarbartolo spent roughly two years cultivating access from within. He rented an office in the Antwerp Diamond Centre itself, posing as a multi-lingual gem importer. The lease granted him automatic access to the vault beneath the building—a detail that transformed his presence from suspicious outsider to trusted tenant.

Notarbartolo recruited four accomplices for the execution. Using a specially engineered mechanical device with a hand crank, the team methodically opened 109 of 189 safety deposit boxes. The operation required precision timing and intimate knowledge of the vault's mechanics—details that suggest either inside assistance or months of reconnaissance. The theft itself was executed cleanly and with minimal trace evidence left behind.

The escape plan showed equal sophistication. The gang split into separate routes: some returned to Notarbartolo's Antwerp apartment to regroup, while others drove south to Italy, where the group intended to reunite and divide their haul. They planned to dispose of incriminating evidence near the E19 motorway connecting Antwerp and Brussels.

But the perfect crime fractured almost immediately. On February 21, 2003—just five days after the heist—Belgian police arrested Notarbartolo. The subsequent investigation led to the conviction of multiple gang members, yet a crucial mystery persisted: Where did the diamonds go? Despite arrests and sentences, approximately $63 million in diamonds disappeared entirely. Even today, that portion of the loot remains at large.

In a 2009 interview with *Wired* magazine from his prison cell, Notarbartolo claimed he had been hired by unknown employers who remained unnamed. He never identified them, and Belgian authorities found no evidence of a third-party mastermind pulling strings from behind the scenes. Whether true or a convict's attempt at legend-building remains unclear.

The case has captured international fascination because it represents something rare: a major crime that was simultaneously solved and unsolved. Police apprehended those who executed the heist, yet the mystery of the diamonds' destination, and the possibility of higher-level conspiracy, remains open.

Netflix's 'Stolen: Heist of the Century,' directed by Mark Lewis and produced by Amblin Entertainment and Raw TV, adapts Scott Andrew Selby and Greg Campbell's nonfiction book 'Flawless: Inside the Largest Diamond Heist in History.' The 95-minute documentary examines not just what happened on that February night, but how a group of criminals managed to penetrate a facility that was supposed to be impenetrable—and why so much of what they stole has never been found.