the biblioteca livia simoni, the museum's library, is situated at the ii floor of the museum. it was formed in 1952 with 40,000 volumes donated by author and "corriere della sera" critic renato simoni; it is named in honour of his mother. today it holds some 140,000 works related to theatre history, opera and ballet including librettos, periodicals and the correspondence of musicians, actors and dancers, as well as books.