In mid-seventeenth-century Venice, opera first emerged from courts and private drawing rooms to become a form of public entertainment. Early commercial operas were elaborate spectacles, featuring ornate costumes and set design along with dancing and music. As ambitious works of theater, these productions required not only significant financial backing, but also strong managers to oversee several months of rehearsals and performances. These impresarios were responsible for every facet of production from contracting the cast to balancing the books at season's end. The systems they created still...