A painting by Gustav Klimt became the second most expensive piece of art ever sold at an auction. Klimt's "Portrait of Elisabeth Lederer" sold on Tuesday after a 20-minute bidding war between six bidders at Sotheby's in New York. Five Klimt pieces from the collection sold at the auction for a total of $392 million, Sotheby's said. The "Portrait of Elisabeth Lederer" fetched $236.4 million alone. Sotheby's did not reveal the identity of the portrait's buyer. The most expensive painting ever sold