 In that capacity he provided the texts and libretti for numerous musical spectacles and court entertainments both sacred and secular, many of them marking royal occasions.One of the distinguishing features of Salvadori's opera libretti was his extensive use of the chorus not only to conclude each act but also to link scenes within an act or to frame the singers' solo pieces.He was a pioneer in the sacred opera genre ("azione sacra") for which he wrote "La regina Sant'Orsola" (The Queen Saint Ursula) in 1624 and "Istoria di Iudit" (The story of Judith) in 1626.