This volume explores the important role that epistolary exchanges play in the reconstruction of musical and theatrical contexts all over Europe in the early modern age, with particular attention to the century of the Enlightenment. Correspondence often bears witness to the reconstruction of performers' careers and theatrical venues, and to the transfers of professionals and repertoires, as well as to social themes and production issues. Archival sources, private letters, and official documents are not only rich in precious data and information, but can also provide material for new research perspectives, related both to their methodological implications and to the interpretation of music and theatre in a given time and place, along with raising questions about historical performance practices and their current revival.