Billionaire has described the allegations as “preposterous”, but says he cannot continue to be effective in his current role

Christie's sale of 46 works from La Salle collection will diminish the museum and its academic programme

Expert on Russian art Simon Hewitt discusses developments in The Art Newspaper's current cover story, plus we explore an unusual collaboration at Hauser & Wirth Somerset

Heirs of George Costakis, Naum Gabo and leading scholars disputed provenance claims of works on show at the Museum voor Schone Kunsten

Museum claims it was an "oversight", but others say it was political

The retired dealer will no longer be involved with the Artist Rooms initiative

Controversy prompts debate about the governance and ethics of university art museums

Christie’s sale of 46 works from La Salle collection, by artists such as Matisse and Degas, has angered arts professionals

The trinkets drew criticism from anti-racism campaigners

Activist targets American photographer’s latest show for second time amid claims of promoting paedophilia

South African artist is campaigning against gallery's contract with Wilson Security and its involvement with country's offshore detention facilities

Foundation protecting the country’s cultural heritage to launch an appeal to the Culture Ministry

Three quarters of known incidents go unchallenged according to Arts Professional study

Controversy provides "opportunity for conversation", museum says

Curators call on St Petersburg prosecutor to investigate "criminal expropriation" of the artefact

Improvements are well documented, but rules are still inadequately enforced

German-born curator hits back against “baseless” accusations of a conflict of interest

Work that was removed from East End housing estate now on show in Canary Wharf

Domestikator piece was withdrawn by the Louvre from its surrounding gardens

Domestikator was due to go on show in garden close to Paris museum as part of contemporary fair's public programme

Dakota elders have decided the fate of the controversial sculpture

Sam Durant’s Scaffold is a powerful work that should provoke anger about the death penalty, not the artist’s ethnicity

Working group appointed after public outcry recommends new programme mixing art and horticulture

Sam Durant’s Scaffold, which includes a recreation of a gallows used to hang 38 Dakota men in 1862, will probably be dismantled

Artist Nico Widerberg’s sculptures welcomed by many, but the way an anonymous donor is funding them upsets others