National and international catalogues of Italian music libraries

Robert Eitner (1832-1905): Biographisch-bibliographisches Quellen-Lexikon der Musiker und Musikgelehrten der christlichen Zeitrechnung bis zur Mitte des neunzehnten Jahrhundert (Leipzig, Breitkopf und Härtel, 1900-1904),
universal bio-bibliographies, digitised in Gallica.

Printed catalogues of historical collections: Naples, Florence, Bologna, etc.

1952: RISM, Répertoire International des Sources Musicales: The first of the "R-projects" of IAML (International Association of Music Libraries) and IMS (International Musicological Society), established 1951.
Aims at cataloguing the whole historical music heritage.
1965: URFM, Ufficio Ricerca Fondi Musicali: National catalogue of music manuscripts to 1900: 162,000 titlecards; National catalogue of printed music to 1900: 160,000 titlecards; International catalogue of Italian librettos to 1800, 26,000 titlecards
1979: IBiMus, Istituto di Bibliografia Musicale: Holds the titlecards of music manuscripts created for RISM
Publishes catalogues of music collections