The General Archive includes materials from 1880 to 1940, an estimated 400.000 items. The material consists of correspondence which d’Annunzio received from diverse correspondents and thousands of admirers. The archive was organized when the poet was still alive and his correspondence was sorted and grouped into files. Over 140 card indexes from that period are available, arranged in alphabetical order according to the names of the correspondents (people, associations, places) on cards which indicate the position in the archives.
Among the numerous files we can cite those addressed to such noteworthy names as Luisa Baccara, Italo Balbo, Arrigo Boito, Renato Brozzi, Luigi Cadorna, Costanzo Ciano, Galeazzo Ciano, Claude Debussy, Adolfo De Carolis, Eleonora Duse, Georges Herelle, Curzio Malaparte, Pietro Mascagni, Francesco Michetti, Benito Mussolini, Ugo Ojetti, Vittorio Emanuele Orlando, Giovanni Pascoli, Ildebrando Pizzetti, Giacomo Puccini, Ruggero Ruggeri, Guido Treves and his publishing house, Augusto Turati, Paul Veléry, as well as those containing the correspondence with his family and with the Italian royal family.