Barbara Novak is Helen Goodhart Altschul Professor of Art History Emerita at Barnard College and Columbia University. She is the acclaimed author of American Painting of the Nineteenth Century ("surely the best book ever written on the subject"--Hilton Kramer, The New York Times Book Review) and Nature and Culture ("awesomely good"--Anatole Broyard, The New York Times). She has been a Commissioner of the Smithsonian's National Portrait Gallery for the last twenty-five years.