This volume of essays draws together recent work on historical music theory of the Renaissance. The collection spans the major themes addressed by Renaissance writers on music and highlights the differing approaches to this body of work by modern scholars, including: historical and theoretical perspectives; consideration of the broader cultural context for writing about music in the Renaissance; and the dissemination of such work. Selected from a variety of sources ranging from journals, monographs and specialist edited volumes, to critical editions, translations and facsimiles, these previously published articles reflect a broad chronological and geographical span, and consider Renaissance sources that range from the overtly pedagogical to the highly speculative. Taken together, this collection enables consideration of key essays side by side aided by the editor's introductory essay which highlights ongoing debates and offers a general framework for interpreting past and future directions in the study of historical music theory from the Renaissance.