"A work of great importance in the field of early Renaissance Italian music, which documents the emergence of Rome as a major musical center."--Martin Picker, editor of The Motet Books of Andrea Antico "This book presents an immense amount of new material about music at San Pietro, and by extension in Rome, during a crucial period in the history of Renaissance music. It will be warmly welcomed by specialists and will also be controversial because of the innovative attempt to group anonymous works into families much as art historians do with paintings. Reynolds is one of the few scholars I know who works comfortably in both the traditional historical mode and the new critical one."--Alejandro Planchart, author of The Repertory of Tropes at Winchester