While Sotheby's struggled with Little Electric Chair, Christie's had no such problems

The works are being sold by Westdeutsche Spielbanken to raise funds for restructuring

The project will make hundreds of the artists films more accessible

The institution has formed a partnership with Delancey Street Associates

Zhang Lan bought Little Electric Chair for $10.5m

Richard Dorment, Chief art critic at The Daily Telegraph, discusses the works

An unpublished list provides details of the fate of 44 paintings confiscated by the Andy Warhol estate in 1991

Foundation’s sales agent also worked for authentication board; president rejects claim decisions may have been made for financial gain

Kennedy captures the artist's private side

The inaugural sale made $17m last month

Phillips’s chief executive says Frieze might have distracted potential buyers

“I think it’s interesting the way Warhol polarises people,” says Catherine Johnson. “Some people love to hate Andy”

They hope to back up their bold claim that Warhol "had the greatest impact of any artist in the past 50 years"

The decorative qualities of the pop artist put him in a tradition dating back to the 18th century

The artist’s foundation reveals its intention to become one of the largest grant-making organisations in the country

While some fear the negative effects of the closure of the vetting board, others say its role was not essential

Few will mourn its demise

Poignant footage of Reverón's twilight years, Hockney playing the documentarian and Jeremy Deller in conversation with Anthony d'Offay on Warhol's transformative power

Joe Simon-Whelan spent three years trying to prove authenticity of a painting depicting the artist himself

A broad range of works reap favourable prices

Simon-Whelan says he lacks the financial resources to pursue his case

Sarah Morris, Mark Bradford, and Andy Warhol are this season's London highlights

Authentication board says famous museum director “falsified” their history

Gagosian among four called to court

The market has recalibrated, but major pieces spark highly charged bidding wars

A $1m reward is being offered

Collector says a signed work from the same series confirms his work is genuine

Owner cancels reward for his missing set, citing problems with his insurer

Twenty Factory regulars look back on the creative freedom that fuelled the New York enterprise, while three art schools are brought under the microscope

The large-scale “disaster painting” is the most expensive Andy Warhol ever to sell at auction