Sotheby’s will sell the works from collection of Gladstone, who died last year, and more than a dozen pieces from Luxembourg’s New York home

The dealer, who died in Paris “after a brief illness”, represented many of the most ambitious contemporary artists of the past half-century

The fair continues to foreground local artists and galleries while serving as a global entry point to the southern Californian city

Wangechi Mutu at Gladstone, Adriana Varejão at Gagosian and the unveiling of Day’s End by David Hammons

From Ann Craven at Karma to Madeline Hollander at the Whitney

The pioneering dealer is bringing ten big-name artists with him, including Arthur Jafa, Joan Jonas, Alex Katz, and Rirkrit Tiravanija

From a tribute to a guerrilla soldier and priest to an exploration of black female beauty, collectors snap up pictures on fair's VIP day