Works by Pablo Picasso, Jackson Pollock and Amedeo Modigliani are going up for auction from the late U.S. mall developer A. Alfred Taubman’s collection, which is valued at more than $500 million, Sotheby’s said on Friday. The auction house said the more than 500 works stretching from antiquity to contemporary art make up the most valuable private collection ever offered at auction. The collection will be auctioned in New York in a series of sales starting in November.