This tour-de-force is scored for three groups. Group 1 consists of SATB Soli and String Quintet; Group 2 is SATB (Choir 1), Two trumpets, Two trombones and chamber organ 1; Group 3 is SATB (Choir 2), flute, oboe, clarinet, bassoon, double bassoon, and chamber organ 2. Contents: Spes, via, vita · Alma Redemptoris Mater · O lux quam non videt alia lux · Nec mora, carnifices gemini · Attollite portas Principes.