American collector's works, from Doig to decoy ducks, are to be offered across ten sales at Sotheby’s over the next eight months

The gallery says it has been “pulled into a dispute regarding a transaction in which it was not involved”

Auction house is enlisting dealers and curators to promote the legacy of the polymath who is believed to have cursed his collection

Directors Deyan Sudjic and Alice Black say ‘professional activists exploited the situation’ and they stand by their ‘curatorial independence’

Secretary and chief executive of the London museum says he wanted to go “at a time of obvious strength and success”

The London institution says it did not endorse the private event organised by the Italian aerospace company Leonardo

Rockefeller auction plus leap in private and online sales drive 26% increase

Christie’s summit weighs up pros and cons of the technology and how it might bring greater transparency to the art market

The artist wanted his home to become a museum but his 2016 will is being challenged

Bristolian street artist unveiled New York mural in March in protest against her arrest

Is the London-based gallery growing its US team to open an exhibition space there?

Russian activist group describes performance as a tribute to dissident poet and artist Dmitri Prigov

MCH Group expands burgeoning roster of international art fairs with annual November event

British curator Norman Rosenthal says Blenheim Palace banquet “severely compromises” past exhibitions, while cultural figures speak out about president’s policies

Prices for larger works by the Bristolian street artist could fetch more than £5m

Museum director due to take up new role at London's Acute Art early next year

Hong Kong show features rarely seen archival material, while 23 artists have made new works for an exhibition dedicated to memory in London

Painter’s descendants reach agreement with Kunstmuseum Bern, which has been acknowledged as the rightful owner of La Montagne Sainte-Victoire

Christie’s introduces day sale format and established names give way to new talent

Artist was 80 years old when he began the painting of a former Tate cataloguer

New section at London fair will explore artists who railed against "the idea that genius resided solely in masculinity"

The young men, believed to be in their teens and early 20s, have been identified by artists as Kbag, Lover and Trip

Sotheby’s auction includes personal works by Hirst gifted to Dunphy, or sketched on the back of restaurant menus

Anny Shaw asks if auction houses and dealers should pay their dues to the artists from whom they profit

Works and archival material at several stands at the fair honour big names in the art world who have died this year

Works were created by the artist when he was sleeping on a friend’s couch in Manhattan

New initiatives, fair subsidies and a focus on Swiss artists help dealers to adapt

The exhibition, which opens in February, will focus on Blue and Rose Periods

Artist lands two big sales at Art Basel after record-breaking auction result

A taster of the artist’s latest project is on show at Art Basel ahead of its unveiling at Tate Modern in London