Tenebrae, meaning Darkness, was written by Monsignor John Edward Ronan - principal founder of Toronto's St. Michael's Choir School. Tenebrae conveys the sorrow of Holy Week through solemn and noble music. This year's presentation will feature the MOSAIC Canadian Vocal Ensemble, Alumni of St. Michael's Choir School and members of the Our Lady of Sorrows adult choir, led by our Music Director, Gordon Mansell.