- Papal Physician: [after Lucrezia has instructed the Papal physician on how to force the liquid charcoal down her poisoned father's throat] But this is witchcraft!
- Lucrezia Borgia: [Pointing a dagger at the physician] This is physic!
- Cesare Borgia: Do what she says... every detail... and if his soul departs. I shall insure it does do so alone!
- Cesare Borgia: [Walking into Della Rovere's cell] My father lives! You failed!
- Giuliano Della Rovere: Ah.
- Cesare Borgia: What say you to that?
- Giuliano Della Rovere: Today he lives. One day he shall not, and on that day where will you be?
- Cesare Borgia: What use am I to you dead?
- Cesare Borgia: [Ominously] I do not want you dead... not for a long time.