Upon his death on October 6, 1959, Bernard Berenson left to Nicky Mariano the vast collection of correspondence which he had accumulated during the nearly sixty years of his residence at Villa I Tatti. On the centennial of Berenson’s birth, The Harvard University Center for Italian Renaissance Studies, now established at I Tatti, arranged to publish this inventory of the correspondence in order to make available to interested scholars a knowledge of its contents. The inventory is divided into two parts: all correspondents are listed, with cross references, in Part One; letters written by Bernard or Mary Berenson, or by Nicky Mariano, are listed in Part Two by recipient.