Are charity art auctions, not donations, the new model for offsetting taxes?
Marlene Dumas donates Mouth painting about women's rights for Amnesty International sale
Ai Weiwei and Richard Serra have also given works to the auction taking place at Sotheby's Paris
Marlene Dumas at Palazzo Grassi review—exhausting and uplifting at once
Venice exhibition elegantly displays the tension between seduction and repulsion in the South African artist's work