Congregation Part; pack of 25. Hopson's service of Tenebrae follows a tradition of the early church dating back to the eighth century, and commemorates the final hours of Christ's life on earth as He prepared for and suffered death on the cross. Tenebrae: A Service of Darkness may be performed as a service in its entirety, or portions of the work may be extracted and performed separately throughout Holy Week. This exceptionally moving work is destined to become a staple in Holy Week repertoire for decades to come. This congregational part is one copy with permission to reproduce 50 copies.