The Répertoire International des Sources Musicales (RISM) is an international, non-profit organization with the aim of comprehensively documenting extant musical sources anywhere in the world.
Cataloging musical sources is financed and carried out by various national and international institutions.
Independent national working groups at libraries and archives in many countries worldwide catalog historical musical sources: music prints, music manuscripts, libretti, and theoretical writings about music. The results are edited and published by RISM.
⇒ RISM documents what exists and where it is kept.
RISM's database offers the most comprehensive documentation available for music manuscripts and printed music for the time between 1600 and 1800. It continues to grow through monthly updates and averages around 30,000 new records anually.
The RISM Zentralredaktion is a project of the Academy of Science and Literature, Mainz.
More information can be found on the RISM website.