Description on Youtube:
Adrian Willaert's sacred motet - 'O magnum mysterium' 1545. Set for SATB choir, sung a cappella. Fourth of the nine responsories for Matins of Christmas Day.
Cappella Marciana, Marco Gemmani - conductor.
O magnum mysterium et admirabile sacramentum,
ut animalia viderent Dominum natum jacentem in praesepio.
Beata Virgo, cujus viscera meruerunt
portare Dominum Jesum Christum.
O great mystery and wonderful sacrament
that animals could see the birth of the Lord lying in a manger.
Blessed is the Virgin whose womb was worthy to bear Christ the Lord.