Margot Fassler is Keough-Hesburgh Professor of Music History and Liturgy at the University of Notre Dame. Her works include The Virgin of Chartres: Making History through Liturgy and the Arts, Gothic Song: Victorine Sequences and Augustinian Reform in Twelfth-Century Paris, and a series of films on sacred music. Fassler is a member of the American Academy of Arts and Letters; her awards include a Guggenheim Fellowship and the American Musicological Society's Otto Kinkeldey Prize. Walter Frisch is H. Harold Gumm/Harry and Albert von Tilzer Professor of Music at Columbia University. He is the author of numerous books and articles, including Brahms: The Four Symphonies, The Early Works of Arnold Schoenberg 1903-1908, and German Modernism: Music and the Arts. He is the recipient of two ASCAP-Deems Taylor Awards and fellowships from the National Endowment for the Humanities, the Alexander von Humboldt Foundation, and the Center for Scholars and Writers at the New York Public Library.