Nono himself and Yuri Lyubimov wrote the libretto. It premiered at the Teatro alla Scala on 4 April 1975, conducted by Claudio Abbado. Lyubimov directed the original production.
The libretto for the opera was written by Nono and Lyubimov, with a premiere performance at the Teatro alla Scala on April 4th, 1975, conducted by Claudio Abbado and directed by Yuri Lyubimov.