The following new sources have been added to the database:

LE MANS, Médiathèques, TH 8° 10544

Two new 13th-century conductus fragments

http://gregorian-chant.ning.com/group/notredameschoolandarsantiqua/forum/topics/new-c13th-french-conductus?xg_source=activity

AUTUN, Bibliothèque municipale, S 084 (067)
278r Essai en notation proportionnelle du XIVème siècle
https://bvmm.irht.cnrs.fr/iiif/21952/canvas/canvas-1976821/view?fbclid=IwAR13iT4qQzYzprmhuv1J9I9qixsDLwo6jKXPqdl-9GxPU0OQB92FoYfSEa4

KLAGENFURT Universitätsbibliothek, Pap.-Hs. 126, Contre-plat inf.
http://gregorian-chant.ning.com/group/notredameschoolandarsantiqua/forum/topics/new-c13th-polyphony-in-klagenfurt-for-pentecost

KRAKOW, Biblioteka Jagiellońska, BJ Rkp.710 III
http://gregorian-chant.ning.com/group/notredameschoolandarsantiqua/forum/topics/new-fragment-with-polyphony-and-unpublished-pieces

LISBOA, Biblioteca Nacional de Portugal, ALC-34
http://gregorian-chant.ning.com/group/notredameschoolandarsantiqua/forum/topics/new-13th-c-motets-in-portugal-las-huelgas-and-firenze-concordance

MUNCHEN Universitätsbibliothek 8° Cod. ms. 0375 Cim. 013
15r Gloria (2 voix)

https://epub.ub.uni-muenchen.de/10929/

PARIS, Bibliothèque de l'Arsenal, Ms 666, 39r -- Ars Nova motet Prosa beati Martialis

http://gregorian-chant.ning.com/group/arsnovaetarssubtilior/forum/topics/a-early-ars-nova-motet-prosa-beati-martialis