The National Court Theatre in Mozart's Vienna provides a valuable context for Mozart's career as an opera composer in Vienna by investigating the operation of the court theatre under Emperors Joseph II and Leopold II. The author brings together a large number of hitherto unavailable archival sources, namely the diary of Count Karl Zinzendorf (from which transcriptions have been made of all passages that address the music and theatre in Vienna from Easter 1783 to Easter 1792); theatre account books (with transcriptions of payment records for all the salaried performing personnel as well as the semi-annual lists of subscribers to the boxes in the theatre); and the theatre posters, almanacs, newspapers, and records kept by the theatre administration, which have been compiled by the author into a performance calendar. The final section of the book rounds out the picture of Josephinian theatre with a discussion of the theatre's management and an analysis of the attendance figures.