Audiffredi Catalogue (and his Supplement) arranged alphabetically by author and title (printed works from the 16th to 19th century, belonging to the original collection of the Library) 
Catalogue of Incunabula Catalogue of Manuscripts
There are also numerous special catalogues (e.g., 16th century editions, heraldry, music, theatre) and printed catalogues of the various Library exhibitions.
Since 1991 the Casanatense Library has been part of the 
National Library Service (SBN Servizio Bibliotecario Nazionale). All new acquisitions and a considerable number of ancient works are catalogued using International Standard Bibliographic Description (ISBD) and are systematically entered on-line into the SBN. From 2006 November the Casanatense Opac is online
