Il Duco Nero on AllMovie

In this historical costume drama from director Pino Mercanti, Caterina Sforza (Gloria Milland) uses beautiful women as assassins in order to poison Cesare Borgia (Cameron Mitchell). The film deals more with Borgia's reputation as a playboy than with his military victories, and the accent is on Sforza's jealousy and hatred. Mitchell was a regular presence on Italian screens throughout the decade, and Euro-film buffs will recognize Conrado San Martin and Franco Fantasia among the cast.