She first gained notoriety for her portraits of such artists as Jean Tinguely, Miki de Saint-Phalle, Eva Aeppli, Norman Mailer and Andy Warhol, as well as documentation of an avant-garde community known as the ???Nouveau Realistes.??? Since coming to Omaha 40 years ago, the Mercers have helped transform the Old Market into the city???s artistic community, most currently with its Moving Gallery exh