(Berlin, 1947-) Is an art critic, media theorist, and philosopher. He is currently a Global Distinguished Professor of Russian and Slavic Studies at New York University and Senior Research Fellow at the Karlsruhe University of Arts and Design in Karlsruhe, Germany. He has been a professor of Aesthetics, Art History, and Media Theory at the Karlsruhe University of Arts and Design/Center for Art and Media in Karlsruhe and an internationally acclaimed Professor at a number of universities in the United States and Europe, including the University of Pennsylvania, the University of Southern California and the Courtauld Institute of Art London.