How many quartets does Haydn have?
Joseph Haydn wrote sixty-eight string quartets.
How many quartets did Beethoven write?
The definition could well read, “Beethoven's quartets are widely regarded as the supreme form of chamber music.” He wrote 16 string quartets, and they reveal his evolution as a composer and a man.
What does Op 76 No 3 mean?
76, No. 3, boasts the nickname Emperor (or Kaiser), because in the second movement is a set of variations on "Gott erhalte Franz den Kaiser" ("God save Emperor Francis"), an anthem he wrote for Emperor Francis II, which later, is the national anthem of Austria-Hungary.