Photographer Gianfranco Gorgoni says copies of his pictures of the California land art project were shown and reproduced without his knowledge

Shows about the collapse of borders between North and South America now face a new reality

Thousands of objects were falsely labelled and shipped to the arts-and-crafts company, according to prosecutors

The former head of the Serpentine will take over as senior global director of the commercial gallery in September

Buyer rejects compensation offer for US artist’s body print

Pieces, purchased by individuals involved in a money-laundering investigation, were given to the actor as gifts

The artist says her project will examine how the US has become a plutocracy

The sale at Sotheby’s comes after a restitution agreement was reached between the heirs of the original owners and the trust of the most recent one

He has been sentenced to 180 days in a private facility, and three years of formal probation

Japanese billionaire Yusaku Maezawa bought the work in New York for almost double the artist's previous record

Larry Gagosian snags top lot, Cy Twombly’s Leda and the Swan, for $52.9m

Trump-inspired post-election “wealth effect” may be waning

He has made a name for himself with thematic auctions that mix Modern and contemporary works of art

Tad Smith spun a positive outlook based on proposed tax cuts and a new view of the auction house as a “media company”, pointing to increased web traffic

The conceptualist's project will expose US institutions’ links to the country’s conservative elite

The mythological work is the artist’s first large-scale figural painting auctioned since 2001

Other high-net-worth donors include Sheldon Adelson, Steven Wynn, and Henry Kravitz

Since the arrival of a contemporary fair jolted its local collecting scene, Dallas has gone from outpost to hot spot