sapiens OP , 6 months ago

@ClaireFromClare @medievodons I don't own any fragment or know other individuals that own, besides archives or museums. But there are lot of repositories regarding this kind of music and some of them thoroughly register their origin and whereabouts. You may already know most of them:

Musicologie Médiévale
https://gregorian-chant.ning.com/

Database of Melodies and Texts of Gregorian Chant
http://www.globalchant.org/

Usuarium (user auth. required)
https://usuarium.elte.hu/

GregoBase (more music related but has score's images)
https://gregobase.selapa.net/

Cantus Index: Catalogue of Chant Texts and Melodies (big repos.)
https://cantusindex.org/

MMMO Database
http://musmed.eu/

I hope this helps 🤔