The first extended study of the combined reception of Haydn and Mozart in the long nineteenth century, this book generates new, holistic understandings of their musical, cultural and historical significance in the Germanic, French and Anglophone worlds. It places a wide range of written sources under the microscope, including serious and popular biographies, scholarship, musical and non-musical criticism, and a diverse body of fiction, and evaluates the impact of anniversary commemorations. Haydn and Mozart in the Long Nineteenth Century determines how reputations, images and narratives for the two composers converge, diverge, develop at different speeds, and influence one another. Countering received wisdom about Haydn's reputational decline and reassessing Mozart reception through consideration of a broad spectrum of publications, we hear Haydn and Mozart speaking to the long nineteenth century in more nuanced, powerful, and persuasive voices than previously recognized.