Someone PLEASE tell me the name of the opera he sees in Hannibal

You know those questions someone asks you and they get stuck in your head and you have to find out the answer? Well this has been driving me insane:

What is the name of the opera Hannibal goes to in ‘Hannibal’?

Any feedback would be greatly appreciated, thankyou.

http://us.imdb.com/Trivia?0212985

At the end of the book version, Clarice and Hannibal attend an opera together in Buenos Aires, where Barney spots them. I don’t have the book here, so I don’t know if they see the same opera.