From large-scale surveys of Judy Chicago and Ed Ruscha, to showcases of Barkley L. Hendricks’s portraits, Ruth Asawa’s works on paper, Shary Boyle’s surreal ceramics, Korean experimental art and more

The show takes a "maniacal and majestic" triptych as its departure point, before using a skilful combination of works and personal effects to provide a deep understanding of the German artist

The sale of the New York dealer, who died earlier this year and was once a vocal critic of auction houses, will feature works from the 14th to 20th centuries

New York gallerist railed against auction houses, the inflation of prices and reputations, the industrial expansion of the art market, while still doing great business

Hamburg’s Kunsthalle to publish photographs of 843 paintings for free research tool