Source E-TUY (Tuy) Archivo Capitular de la Catedral de Tuy L V Folio 049v-052r Sequence 001 Text Potens in terra (Beatus vir, tone 3) Feast De BMV Liturgical occasion V Genre PS Number of voices 4 Composer Anonymous Marginalia Headed: ‘Vesperae B. Mariae: A4. 3 tono’ Images 049v-050r
