Auction week titans open up: what Eli Broad, Lily Safra and Ron Perelman are buying and avoiding right now.

Damien Hirst was commissioned to create two eye-popping sunflower paintings with watch components from Panerai timepieces.

"Maurizio Cattelan: All" a retrospective of the artist at the Guggenheim, encompasses 128 works that hang from the famous rotunda.