When Gustav Klimt's Portrait of Gertrud Loew-Felsövanyi (1902) sold at Sotheby's London in June for $39 million, many speculated about the buyer's identity.

Now, an investigation conducted by the Austrian daily Der Standard has revealed that the painting was not bought by Ronald Lauder as was previously assumed. The buyer is Joe Lewis, a British billionaire who's made his fortune in foreign exchange market (forex) trading in the early 1990s.