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

Artists, curators and the community unite to create corner of paradise in rundown park

Authentication board says famous museum director “falsified” their history

Gagosian among four called to court

Yale prepares for the 2012 installation of its decorative arts galleries by reconstructing a period room

A group of the soldiers were on loan to the La Moneda Palace in Santiago

This massive retrospective will include recreations of past pieces as well as a new, physically demanding work

Sikorski says that it would be better to have a park in its place

He is creating video and photographic works to document the conflict

A $1m reward is being offered

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

He was prevented from testifying in defence of activist Tan Zuoren

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

New research challenges Russians’ claim that they own many cultural valuables from the independent state

Both sides claim the other damaged historic buildings

Former Factory assistant claims he made the disputed work

The architect has described the Italian Prime Minister as a xenophobe who “hates foreigners” and compares his government to the Fascist regime

Negotiations have lasted five years only to fall through due to security issues

The shipping and storage company has been in hot water since the east London fire

The difficulty has arisen because Mr Eastman left the bulk of his estate in a “marital trust” for his wife

Problems with their export and provenance seem to indicate the warriors are not quite what they seem

The New York organisation has disbursed more than $200m in cash grants and art donations since the artist's death in 1987

Visitor numbers are expected to rise to 3 million this year

Eleven-year dispute has been settled out of court

The Andy Warhol Foundation for the Visual Arts has awarded the museum $600,000

The British Museum show will travel to another four venues

In 2004, Egypt sentenced Mr Aboutaam in absentia to 15 years’ imprisonment

Can US museums help win the war on terror?

Charges focus on former executive director of the New York Academy of Art

Denying the artist’s homosexuality makes his work more saleable, she says