Finally, the time has come: over the next few years all of Mozart’s 26 string quartets will be published by Henle in an Urtext edition of both score and parts. All previous editions have left much to be desired, for example as concerns the correct placement of dynamic markings. Our edition, made with the artistic collaboration of the Armida Quartet, draws upon the large body of modern knowledge concerning Mozart philology and performance practice. We begin with what are, chronologically speaking