Source: PL-WRu I F 413 Cistercian Gradual (Silesia)Folio: 011rSequence: 2Feast: Nativitas DominiOffice: MASSGenre: AllCantus ID: g00556Mode: 2Full text: Alleluia Dies sanctificatus illuxit nobis venite gentes adorate dominum quia hodie descendit lux magna super terram