Requiems Choruses, Sacred (Mixed voices), Unaccompanied Choruses, Secular (Mixed voices) with piano Choruses, Secular (Mixed voices), Unaccompanied Operas September 11 Terrorist Attacks, 2001 Choral music Motets Choruses, Sacred (Mixed voices) with instrumental ensemble Choruses, Secular (Mixed voices) with instrumental ensemble Choruses, Secular (Women's voices) with instrumental ensemble Christmas music Excerpts Oratorios Psalms (Music) Requiem Requiems, Unaccompanied Vocal ensembles with instrumental ensemble Vocal ensembles, Unaccompanied Attentats du 11 septembre 2001, États-Unis Carols Choruses Choruses (Mixed voices), Unaccompanied Choruses, Sacred (Women's voices) with piano Choruses, Sacred, Unaccompanied Choruses, Secular (Mixed voices) Choruses, Secular (Mixed voices) with harp ensemble Choruses, Secular (Women's voices) with piano Chœurs profanes (Voix mixtes) acc. d'ensemble instrumental Ensembles vocaux a cappella