 The music, observing due propriety, serves the poetry so well that nothing more beautiful is to be heard anywhere".Monteverdi was then required to write several pieces for performance at the wedding of the duke's son and heir Francesco to Margaret of Savoy, planned for early May 1608.These included a musical prologue for Battista Guarini's play "L'idropica" and a setting of the dramatic ballet "Il ballo delle ingrate" ("Dance of the Ungrateful Ladies"), with a text by Ottavio Rinuccini.