Music theory of almost all ages has relied on nature in its attempts to explain music. The understanding of what 'nature' is, however, is subject to cultural and historical differences. In exploring ways in which music theory has represented and employed natural order since the scientific revolution, this volume asks some fundamental questions not only about nature in music theory, but also the nature of music theory. In an array of different approaches, ranging from physical acoustics to theology and Lacanian psychoanalysis, these essays examine how the multifarious conceptions of nature, located variously between scientific reason and divine power, are brought to bear on music theory. They probe the changing representations and functions of nature in the service of music theory and highlight the ever-changing configurations of nature and music, as mediated by the music-theoretical discourse.