carmendrahl writes "Photos used to be second-class citizens in the art world, not considered as prestigious as paintings or sculpture. But that changed in the 1990s. As daguerrotypes and the like started selling for millions of dollars, fakes also slipped in. Unfortunately, the art world didn't have good ways of authenticating originals. Cultural heritage researchers had to play catch-up, and quickly. Two fraud cases, one involving avant garde photographer Man Ray, turned photo conservation from a niche field into a mature science."