Taken from Piae Cantiones (1582), Divinum Mysterium is the name of the medieval chant melody which accompanies the hymn Of the Father's Love Begotten. Piae Cantiones is a
Do not let the slow start to this piece deceive you! Containing many contrasting sections, this work is a medley of O Come, O Come, Emmanuel (Veni Emmanuel); Of the Father's Love Begotten