This article offers a revisionist perspective on the contested notion of Witold Lutosławski's authenticity as a modernist composer. In doing so, it seeks to contribute to musicology's increasingly nuanced narration of the story of musical modernism. The case is argued partly by relating Lutosławski's output to broader traditions in twentieth-century modernism, including musical representations of alienation, loss, violence, and nostalgia. Crucially, however, it is also argued by interpreting the more conventionally gratifying aspects of his pieces as something other than a hedonistic cop out. Adapting ideas from Michel Foucault, such passages are deemed heterotopian in function and interpreted in a wider-ranging sociohistorical context incl...