It's the things dreams are made of: you pick up an innocuous painting at a car boot sale only to discover that it might be a ...

A team of specialists is trying to prove that a canvas bought for less than $50 was painted by the iconic artist—and is worth $15 million.

A reissue of “NEUF”—which championed Henri Cartier-Bresson, Robert Frank, and Brassaï—shows why Robert Delpire’s midcentury publication remains an icon of the printed page.

For the first time in its storied history as the world’s largest comics-art auctioneer, Heritage presents an original Gaston Lagaffe Gag — No. 839, to be specific, dating to 1978.