Estate of Jackson Pollock’s mistress builds new case around forensic analysis

Premiums head south but conditions more onerous

Matisse’s drawing of sleeping beauty fitted mood of quiet Impressionist and Modern sale

Contemporary art auction in New York meets expectations as market finds its level

Auction house’s post-war and contemporary sale in New York last night was patchy

Shaky stock market dampens Christie’s contemporary and Modern art auction

The auction house’s CEO Ed Dolman pins tepid results to “selective bidding” by collectors saving their money for the week’s auction gauntlet

Billionaire sells Blue Period La Gommeuse for $67m in upbeat Impressionist and Modern sale

Paula Cooper's exhibition, which opens tomorrow, includes miniatures of some of the Pop artist's most monumental pieces

Modigliani soars, but many pieces once owned by Alfred Taubman fall flat

Latest edition of performance art biennial launches this month, bringing new works to venues across New York

Retailers need to do more to protect buyers from fraudsters selling fakes as online art businesses attract more investment

Amid destruction and murder, it is difficult to know the extent of the terrorist group’s antiquities trafficking

Ten years after hurricane Katrina hit New Orleans, we asked artists and curators to describe what they see as the defining image of the storm and its aftermath