Photographer Lynn Goldsmith says recent Supreme Court ruling on Google supports previous decision that went against the Pop artist's foundation

The charges against her stemmed from the fraudulent sale of a £1.1m Yayoi Kusama pumpkin sculpture to a Hong Kong collector, while a similar claim against her over a Warhol portrait remains in German court

Lawyers for the foundation claim a US Court of Appeals decision conflicts with precedent and threatens historically significant contemporary art work

Decision appears to signal that appropriation artists may have to proceed more cautiously

George Haag, who has pleaded not guilty, says he thought the portrait of Andy Warhol “would look better somewhere else” and “just wanted to make people laugh”

Lobby groups fear abolishing tax-free shopping will deter buyers from China, the Middle East and Russia at a cost of £6bn

An upper-class rebel who became Warhol's best friend and "the only person who could yell at him"

New book brings together hundreds of images of nude young men, which “are imbued with an emotional vulnerability that few of his later works exhibit”

Last-gasp decision after talks with the US museum directors association comes just before a Sotheby’s auction

Two artists also step down as board trustees amid turmoil over plans to deaccession three paintings

“The greatness of the BMA’s collection does not live within three individual paintings,” she says as the sale of a Warhol, Still and Marden approaches

Letter asks Maryland attorney general and secretary of state to investigate planned deaccessioning of a Warhol, Still and Marden

Sale of three valuable paintings by Warhol, Still and Marden points to a thirst for a $65m windfall, with no curatorial rationale

Acting on relaxed rules, it will use the funds for collection care and salary increases as well as diverse acquisitions

His collection of works by Warhol, Twombly, Beuys and Kiefer is on long-term loan to the Berlin museums

Some takeaways from the late US artist and poet’s new memoir Great Demon Kings

Philip Righter pleaded guilty to selling works fraudulently attributed to Andy Warhol, Jean-Michel Basquiat and Keith Haring, among others

Accused of fraudulent sales of a Kusama pumpkin sculpture and a Warhol print, the dealer and collector awaits extradition to the UK after missing court hearing

Three Andy Warhol devotees give their take on the near-1000 page biography

An Instagram Live interview with the writer of a new biography on the famous US artist

Can yet another Warhol retrospective tell us anything new about the Pop Art icon?

Near-forgotten series of striking portraits are part of a 100-strong show of works opening at the London museum this week

The Munich-based dealer and collector is also due to stand trial in London for allegedly stealing £1.1m in Kusama pumpkin sale

We look back at the biggest art sales of the year, which reveal a concentration on New York over London and a continued dominance of 20th century male artists

Billed as the next big thing, schemes to sell shares in works of art have yet to excite the market

Tributes paid to key figure of US counterculture whose work was “groundbreaking for its time”

With the Pop artist's blockbuster retrospective currently on show at SFMoMA, we delve into the life and legacy of the ever-popular painter with artist Jeremy Deller and curator Donna De Salvo. Produced in association with Bonhams, auctioneers since 1793.

Ugo Mulas photographed the 1960s New York art scene and his pictures are now on show at Matthew Marks