La Trobe University - Library: Medieval Music Database - Annual cycle of feasts of liturgical chant, liturgical polyphony and secular music of the late middle ages.

O Maria mater pia

Two-voice anonymous motet

Sources

Florence: Biblioteca Laurenziana, Pluteus 29.1, fol. 393-393v (3/2);
Oxford: Bodleian Library, Lyell 72, fol. 173v-174 (2/1).

Facsimiles

I più antichi monumenti sacri italiani. I. Edizione fotografica, edited by F. A. Gallo and G. Vecchi, Bologna: 1968. Monumenta lyrica medii aevi italica III: Mensurabilia 1, plate CVII.