Source P-AR (Arouca) Museu Regional de Arte Sacra do Mosteiro de Arouca Res. Ms. 032 Folio 067v-071r Sequence 023 Text Urbs fortitudinis nostrae Genre Ca Number of voices 4 Composer Anonymous Marginalia ff. 70v-71r: [Gloria Patri] "A 6" Images 067v-068r 068v-069r 069v-070r 070v-071r
