Tenebrae (meaning ‘shadows’ or ‘darkness’) is a solemn liturgy. The choir sings plainsong psalms and lessons with canticles such as the Lamentations of Jeremiah and the Benedictus as the lights and candles in the church are extinguished one by one. This foreshadows the descent into the spiritual and emotional deep winter of Good Friday and the Crucifixion. The service ends in complete darkness. A dramatic service for Holy Week.