An artist can do more than create objects; he also can turn himself into objects. Wolfgang Flatz has mastered this ability to an extraordinary degree. His self-transformations, performed at great physical risk, are among the most impressive works in this retrospective covering the years from 1972 to 1989. In Handtuch (Towel, 1978), the artist, snugly wrapped up in terry cloth, made himself available to bathroom patrons for 12 hours as the only object for wiping. In Treffer (Hit, 1979), Flatz, sporting nothing but sunglasses, offered himself as a live target. At the entrance to the exhibition