Photography has established itself as part of the international art market today and it features in the world's main art collections. Global sales at auction hit 75 million euros in 2007, up on 65 million euros the previous year. Global price indexes for photography rose 70% over the last decade, outstripping the 43% rise in prices paid for sculpture and the 15% increase for paintings. What's more, works by nine photographers passed the million-dollar mark at auction - something that would ha