RISM This link opens in a new windowContains over 1.4 million records for musical sources: music manuscripts, printed music, libretti, and treatises that are held in music libraries, archives, churches, private collections, and other institutions around the world. The bulk of the manuscripts date from between the years 1600 and 1850. The focus of printed music is imprints up to 1800. However, you will find both older and newer sources in the catalog.