It's the biggest museum in the world.the museum of artworks stolen over the centuries and never rediscovered. These works haunt the nightmares of their owners, and occupy the days of hundreds of police officers across the world, as well as those of a handful of private agencies; no country or museum of importance can claim to have been spared. According to Interpol, art theft is the fourth largest criminal trade, after the drug trade, the weapons trade and money laundering. How could it be otherwise, when the soaring price of art propels the value of some paintings into the tens of millions of Euros? This world appears to be full of mysteries. Crime syndicates rub shoulders with petty criminals and the police care more about recovering the items than they do about arresting the perpetrators.