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Part of hedge fund billionaire Steve Cohen's art collection went on display today at Sotheby's. Paintings and sculptures by Matisse, Modigliani, Picasso, Jeff Koons, and Richard Prince—works that normally reside at Cohen's castle in Greenwich—are all there to be ogled, although don't ogle them too closely if you don't want to come face to face with a burly security guard (see left). Dealbreaker got a sneak peek yesterday and brought a camera along. So if you don't plan to make it in person—it runs through April 14—or you just want to see what $450 million in art in one room looks like, well, off you go. [Dealbreaker]