Adolfo Re Riccardi was a theatrical producer who was active in the first two decades of the 20th century and staged some of Gabriele d’Annunzio’s dramas. D’Annunzio’s correspondence to Re Riccardi comprises 77 pieces: letters, telegrams, personal notes, a receipted bill, a visiting card, a draft contract, written mostly between 1906 and 1914. Read in its entirety, the body of these documents gives an insight on the writing process and the performances of works such as Più che l’Amore, Il Ferro and the unfinished Amaranta, of which Re Riccardi held the rights. Besides, the letters show to what extent the theatre of d’Annunzio was known in the U.S.A. and lastly they offer the chance to analyse the language that d’Annunzio used in his private letters of professional topic.