The famous composer known for his symphonies and requiem is Wolfgang Amadeus Mozart. His prolific output and mastery of various musical forms revolutionized classical music. Mozart's symphonies, characterized by their structural clarity and emotional depth, remain essential parts of the orchestral repertoire. Additionally, his Requiem Mass in D minor, although unfinished at his death, is celebrated for its profound expressiveness and dramatic intensity. Mozart's influence on music is immense, and he is often regarded as one of the greatest composers in Western musical history.