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.