From billion-dollar yachts to diamond watches and rare art, explore 15 of the most expensive things ever purchased by the world’s wealthiest people ...

The world’s most famous painting with a secret message was stolen from the Louvre over a century ago. The criminal, Vincenzo Perugia, was a handyman working at the museum, and he had two handy ...

A long-held lesson of economics is that the value of an item is what someone is willing to pay for it. Still, when it comes to auctions, that concept only partially explains the astronomical prices ...