A.B. summa cum laude, Harvard College, 1973 A.M., Harvard University, 1975 Ph.D., Harvard University, 1980 June 1975-June 1980: variously appointed Teaching Fellow, Tutor, and Grader, Department of Fine Arts, Harvard University July 1980-June 1985: Assistant Professor, Department of the History of Art, University of Pennsylvania July 1985-June 1993: Associate Professor, Department of the History of Art, University of Pennsylvania. Adjunct appointment in the Department of Architecture, 1984-1985. July 1993-June 2003: Professor, Department of the History of Art, University of Pennsylvania. Member of the Graduate Groups in History of Art, Architecture, City and Regional Planning, and Historic Preservation. June 2003-present: Frances Shapiro Weitzenhoffer Professor of Nineteenth-century European Art, Department of the History of Art, University of Pennsylvania.