One of the most extensive repertories of Renaissance sacred music to have come down to us was written for the Cathedral of Treviso. An Allied raid over the city on 7 April 1944 resulted in the destruction of 25 manuscripts of polyphonic music written prior to 1630. In this book, Bonnie Blackburn reconstructs the inventories of two of these lost manuscripts: MS29 and MS30, and explains their puzzling repertory.