The outspoken adviser appears to have closed her Tribeca gallery and is unreachable amid accusations that she defrauded collectors of profits from the sale of an Adrian Ghenie painting

New York judge says the appropriation artist's New Portraits series does not achieve the level of transformation necessary to shield him from litigation

The collector, Stuart Pivar, claims he sold the 1977 portrait of himself to his lawyer for $100,000 because he needed cash quickly; he is now suing that lawyer for $10m

Yuga Labs has won a partial victory in its legal dispute with artists Ryder Ripps and Jeremy Cahen; the decision could impact future copyright copyright rules in Web3

Indiana-based Valparaiso University is reportedly hoping to raise $20m with the sale of works by O’Keeffe, Childe Hassam and Frederic Church from its museum’s collection

A former OpenSea employee has been accused of insider trading; the outcome of the case may change the meaning of that phrase forever

The proposed legislation is seen as an effort to defend Confederate monuments and markers in the public sphere by streamlining civil lawsuits

Heirs of the dealers who sold the collection of medieval artefacts to the Prussian government claim their case can be heard in US court because the dealers were not German citizens at the time of the sale

More than 100 paintings by the late artist and his son were allegedly taken in the FBI raid

While the parties have reached an agreement, the museum says it spent $100,000 on its defence and that the injunction against it sets a dangerous precedent

Karen Lo says the dealer Pearl Lam never followed through with her purchase of a well-known painting by the secretive British artist

The renowned Pop artist, who has suffered from Alzheimer’s-induced dementia for the better part of a decade, is at the centre of a years-long legal war

A marble idol known as the “Stargazer” will remain in the collection of billionaire Michael Steinhardt

Black claimed he was the victim of a conspiracy to push him out of his private equity firm

A jury ruled NFT artist Mason Rothschild’s line of digital handbags was subject to trademark law

"There is no precedent for copyright protections on an artistic style," says a lawyer for artist Lynthia Edwards and dealer Richard Beavers

A district court sided with the school in late 2021, but artist Sam Kerson hopes an appeals court decision will help keep his Underground Railroad murals on view

We uncover the tangled tale of the painting controversially sold off by New York's Metropolitan Museum of Art in 1972 and now in an Athens museum

A judge had previously dismissed the lawsuit brought against the Michigan museum in a dispute over the canvas “The Novel Reader”

The heirs of Karl and Rosi Adler claim “Woman Ironing (La repasseuse)” (1904) was sold under duress by the fleeing couple and are seeking its return—or as much as $200m in compensation

The lawsuit centred on the authorship of a desert landscape painting signed “Pete Doige” and created by an inmate at a Canadian prison

Bought for a Japanese museum in 1987, the masterpiece has just been claimed by the heirs of a Jewish Berlin banker

The heirs of a Jewish collector who fled Germany in the 1930s claim that well-documented provenance issues with the painting “La cueillette des olives” have been overlooked by the museum and the Greek foundation that now owns it

The banker's heirs claim that the current owner, which bought "Sunflowers" for a then-record $39.9m at Christie's in 1987, ignored the painting's provenance issues

Many A-list celebrities have been accused of neglecting to disclose compensation for endorsing Bored Ape Yacht Club NFTs

A court has ruled that Simon Dickinson, who advised a British aristocrat to sell an 18th-century French masterpiece for a fraction of what it later sold for, did not deliberately undervalue the painting

Restitution Study Group have lost their first legal battle but insist the case is still pending

A lawsuit claims that the billionaire sexually assaulted a woman in Jeffrey Epstein's New York mansion

While the judge decided the defendant sold the works in good faith, he ruled that all seven objects purchased by the sheikh are fakes

A spate of recent high-profile cases demonstrate ongoing challenges for the sector