His orchestral works include the so-called "Little C Major" symphony and a C minor work known as the "Tragic" symphony, as well as incidental music written for the play Rosamunde.  
During his years at the commoners' Stadtkonvikt school, he composed an unfinished operetta, The Looking-Glass Knight.  He remained poor, partly due to the continued failure of such operas as The Devil's Palace of Desire and Fernando.  His orchestral works include the so-called "Little C Major" symphony and a C minor work known as the "Tragic" symphony, as well as incidental music written for the play Rosamunde.  All those works are catalogued according to a system devised by Otto Deutsch, which is why they have "D" numbers.  FTP, name this composer of the early 19th century who also wrote a "Great" C major symphony and an "Unfinished" symphony.
During his years at the commoners' Stadtkonvikt school, he composed an unfinished operetta, The Looking-Glass Knight.  
Franz Schubert