Mysterium, sacred cantata in parts VII for four solo voices chorus and orchestra, was composed by Nino Rota in 1962. It is one of the most impressive pieces of the entire catalog, both for artistic mass necessary to implement that for the duration of almost 70 ‘. Despite the excellent reception had by critics and the public, the objective difficulty dall’allestimento mail it has greatly reduced the chances of access to concert halls. This dual publishing allows the execution of one of the high points of the whole composition, the choir Unum panem that closes the first of the seventh party, with only organ accompaniment. The first version provides full voice staffed with the use of a boys choir and the four canonical parts of the chorus, the second is for male voices as well as had been requested by the Seminary of La Quercia Viterbo who commissioned it. Both versions of the Master’s hand.