The thematic catalogue was used as a musical diary by Mozart for recording his music compositions, which he even carried with him when he travelled. Apart from the dates and titles Mozart also recorded other information about the works he listed, such as the instrumentation, the movements they consisted of, performers they were written for or first performed by, dedicatees, dates of first performances, and other details.
The entries for each work listed were written on two pages. On the left-hand page Mozart would list the year, month, and even day a work was completed, in addition to the title of the work and any associated information. On the right-hand page he would write the opening bars of music for the corresponding entry on the left-hand page.
These two pages show the first and last entries in the catalogue. They include the first entry for the Piano concerto in E flat (K 449), and the entries for the operas The Magic Flute (Die Zauberflöte) and La Clemenza di Tito, which Mozart writes was written ‘for the coronation of his Majesty the Emperor Leopold II’.
See more of Mozart's musical diary on Turning the Pages™.