| 1966 | The Whale — dramatic cantata · chorus | Confirmed | 32' |
| 1969 | Celtic Requiem — for soprano, chorus & orchestra · chorus | Confirmed | 20' |
| 1972 | Ultimos Ritos — for soli, chorus & orchestra · chorus | Confirmed | 55' |
| 1976 | Thérèse — opera in one act · opera · chorus | Confirmed | 90' |
| 1980 | Akhmatova: Rekviem — for soprano, bass & orchestra | Confirmed | 50' |
| 1989 | The Protecting Veil — for cello & string orchestra | Confirmed | 45' |
| 1992 | Mary of Egypt — “moving icon” / opera · opera · chorus | Confirmed | 120' |
| 1992 | We Shall See Him As He Is — for soli, chorus & orchestra · chorus | Confirmed | 80' |
| 1993 | The Apocalypse — for soli, chorus & orchestra · chorus | Confirmed | 90' |
| 1997 | Eternity’s Sunrise — for soprano & orchestra | Confirmed | 18' |
| 1999 | Fall and Resurrection — for chorus & orchestra · chorus | Confirmed | 60' |
| 1999 | Total Eclipse — for soli, chorus & orchestra · chorus | Confirmed | 55' |
| 2002 | Lament for Jerusalem — a mystical love song · chorus | Confirmed | 50' |
| 2006 | Popule Meus — for orchestra | Confirmed | 10' |
| 2007 | The Beautiful Names — for chorus & orchestra · chorus | Confirmed | 50' |