Source P-AR (Arouca) Museu Regional de Arte Sacra do Mosteiro de Arouca Res. Ms. 016 Folio 128r-128v Sequence 004 Text Ecce sacerdos magnus qui in diebus suis placuit deo Feast Silvestri Liturgical occasion MI Genre Gr Mode 5 Cantus ID g01332 GT reference 486 Images 127v-128r 128v-129r
