[Ursa major]

I'm a sucker for sad music (oddly enough, I find that it cheers me up!) from the requiems of, for example, Berlioz, Brahms and Verdi, and any number of gloomy symphonic movements from central and eastern Europe; but there is very little that is as sad as the slow movement from Mozart's Piano Concerto #23; the work seems to carry the woes of the world on its slim shoulders.