Simon P. Keefe is the J. R. Hoyle Chair of Music at the University of Sheffield and president of the Royal Musical Association. He is the author of five books, including Mozart’s Requiem: Reception, Work, Completion; Mozart in Vienna: The Final Decade; and Haydn and Mozart in the Long Nineteenth Century: Parallel and Intersecting Patterns of Reception. In addition, he has edited ten volumes, including, most recently, Vienna: A Musical History.