COUNT FRANCESCO CENCI.
GIACOMO, BERNARDO, HIS SONS.
CARDINAL CAMILLO.
PRINCE COLONNA.
ORSINO, A PRELATE.
SAVELLA, THE POPE'S LEGATE.
OLIMPIO, MARZIO, ASSASSINS.
ANDREA, SERVANT TO CENCI.
NOBLES.
JUDGES.
GUARDS, SERVANTS.
LUCRETIA, WIFE OF CENCI AND STEP-MOTHER OF HIS CHILDREN.
BEATRICE, HIS DAUGHTER.

THE SCENE LIES PRINCIPALLY IN ROME, BUT CHANGES DURING THE FOURTH ACT TO PETRELLA, A CASTLE AMONG THE APULIAN APENNINES.

TIME. DURING THE PONTIFICATE OF CLEMENT VIII