You might be thinking of one that starts with A, and that could be Aida.
The Letter - opera - was created in 2009.
The name of the opera house is The Sydney Opera House
o mio babbino caroMimi, in La Boheme.
Depending on the style guide you've been given, you can either italicize the opera's title or include it in quotes. The key is to be consistent with your titles throughout your manuscript.
Opera is the name of an Internet Browser.
opera dies
Sydney Opera House.
Opera. That's the name of the company.
Aida, an Ethiopian princess, in the opera of that name.
The Beggar's Opera a ballad opera in three acts.
The Sydney Opera House is the famous opera house in Australia.
There is no name for it. However the ending of an opera is usually referred to as the finale of the opera.