A Joan Mitchell diptych and a rare stack by Donald Judd: our pick of the May auctions

The Art Newspaper highlights five major lots from New York's May 2025 auctions. Phillips offers Joan Mitchell's diptych 'Plain' (1989), estimated at $5-7 million, from the collection of late Miami art patron Tina Hills. Christie's presents Donald Judd's rare copper and red Plexiglas 'Untitled (Stack)' (1969), estimated at $10-15 million, from the Minimalist collection of the late Henry S. McNeil Jr. Sotheby's leads with Jean-Michel Basquiat's 'Museum Security (Broadway Meltdown)' (1983), estimated above $45 million, and Mark Rothko's 'Brown and Blacks in Reds' (1957), estimated at $70-100 million from the collection of late dealer Robert Mnuchin.