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.  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