Four Italians were recently sentenced for the notorious 2003 robbery that rocked Antwerp’s diamond industry. The daring weekend theft netted $100 million in diamonds from break-ins of over 100 private vaults. Most of that has not been recovered.

Leonardo Notabartolo, the mastermind behind the robbery, started a diamond-front company to examine the building’s security system, police said. He received a 10-year sentence and was fined more than 1 million euros.

Accomplices Ferdinando Finotto, Elio D’Onorio, and Pietro Tavano received five-year jail terms and fines of 5,000 euros.