Patrick Bade is an international guest speaker and senior lecturer at Christie's Education in Modern Art Studies. Klaus H. Carl is the author of numerous works on the history of great cities, and is also a well-known photographer of flora and fauna. A teacher by profession, he is currently devoting himself to a monumental History of Art. Victoria Charles received her Ph.D. in art history. She has published extensively on art history and has contributed to Art Information, an international guide to contemporary art. She is a regular contributor to journals and magazines. Sarah Costello has a Ph.D. in art history and is a distinguished specialist of Greek and Roman antiquity. She has published numerous essays on this subject. She is currently teaching at Rice University.Joseph Manca received his Ph.D. from Columbia University. He is a professor and chairman of the Art History Department at Rice University. An expert on the Italian Renaissance, he has published numerous works on this period, including a book on Andrea Mantegna.