| Librettist | Luciano Berio |
| Date of composition | 1970 (revised in 1977) |
| Premiered | 1970, August 12th in Santa Fe, Santa Fe Province, Argentina |
| First published | Universal Edition |
| Type | Opera |
| Approx. duration | 90 minutes |
| Instruments |
10x
Actor
Voice (Soprano) Voice (Baritone) Voice (Tenor) Chorus/Choir - Vocal Ensemble ; Orchestra |
| Autotranslations beta |
Luciano Berio: Opéra Luciano Berio: Opera Luciano Berio: Oper |