Six String Quartets No.1 in F major, Op. 18 "String Quartet"

According to Beethoven's friend Karl Amenda, the second movement was inspired by the tomb scene from William Shakespeare's Romeo and Juliet. The quartet was heavily revised between the version that Amenda first received and the one that was sent to the publisher a year later, including changing the second movement's marking from Adagio molto to the more specific Adagio affetuouso ed appassionato. Of these modifications, Beethoven wrote: "Be sure not to hand on to anybody your quartet, in which I have made some drastic alterations. For only now have I learnt to write quartets; and this you will notice, I fancy, when you receive them."