Twelve works from the late dealer's private holdings will be auctioned during May's marquee sales in New York.

Sotheby's to sell 12 artworks from Barbara Gladstone's collection in May, including works by Andy Warhol, Richard Prince, and ...

This May, a rediscovered early painting by the artist will headline Sotheby’s Contemporary Evening Auction in New York with a ...

From Fontana’s gold “Fine di Dio” to Burri’s black “Cretto,” Sotheby’s will open its May marquee auctions with works from the dealer’s rarified trove.

5 x 29.2 x 2.1 in. (12.7 x 74.17 x 5.33 cm.) Numbered AP9 with JH456 studio number on Barbara Gladstone label affixed to the reverse Jenny Holzer's fascination with the problems of consumer media is ...