The historical library contains a total of 1,300 volumes, from the sixteenth to the nineteenth century. Its largest holding is that of the books that belonged to Giacomo Carrara, to which the collection of Salvatore Orsetti was added, together with the volumes with the work of the Accademia di Belli Arti. 

Although there is no lack of literary works, with Plutarch, Pliny, Giovanni Boccaccio, Pietro Bembo, Torquato Tasso, and others, there is a predominance of books on the history of art, with works by Leon Battista Alberti, Giorgio Vasari, Giovan Paolo Lomazzo, Sebastiano Serlio, Marco Boschini, and others.

One unusual collection is that of nineteenth-century repertories of drawings of ornamentation, terracottas, carpentry, mechanical elements and theatre sets. 

Some of the volumes (about 200) have been on temporary loan to the Biblioteca Civica Angelo Mai in Bergamo for about thirty years. 

With an inventory that is detailed but not available as an Online Public Access Catalogue (OPAC SBN), the original holding of the library can be consulted, upon request, during office opening hours.