Besides Ernani, Verdi did at least one other Hugo opera: Rigoletto. The libretto is Le roi s'amuse, with an Italianised setting: Triboulet becomes Rigoletto, François I becomes the Duke of Mantua, and Blanche becomes Gilda.
Amilcare Ponchielli's La Gioconda is based on Angelo, tyran de Padoue, but changes the setting and quite a lot about the characters. There's also a Russian operatic version by César Cui, called Angelo, and Saverio Mercadante’s Il Giuramento.
- Entends-tu? je t'aime! cria-t-il encore.
- Quel amour! dit la malheureuse en frémissant.
Il reprit: - L'amour d'un damné.
Victor Hugo, Notre Dame de Paris