RISM-OPAC: International Inventory of Musical Sources
Open-access database of over 700,000 mainly manuscript sources, most written before 1800, from hundreds of libraries and archives around the world. This catalog gives public access to the RISM A/II series: Music Manuscripts after 1600. Search by composer, title, thematic catalog number, music incipit, library, etc.; some catalog entries include links to digitized sources. Sponsored by Répertoire international des sources musicales.