During his final years in Vienna, he composed many of his best-known symphonies, concertos, and operas, and portions of the Requiem, which was largely unfinished at the time of his early death at the age of 35.
I løbet af sine sidste år i Wien komponerede han mange af sine bedst kendte symfonier, koncerter, operaer og dele af hans Requiem, som blev efterladt ufærdigt ved hans død.