at an opera house google image search it to see what it looks like
if what you meant is about the opera house. you'll see it in Sydney Australia
Impossible to answer as you do not specify a country. I suggest you Google opera schools / colleges in your country. It would also depend on the level you are currently at.
He was an architect with original ideas on building an opera house. When Sydney announced a competition for the design of an opera house he felt he would give it a shot after all that is how he earned his keep.
The Sidney Opera House is a relatively new building. It is being preserved as any new building would be - by regular maintenance.
That entirely depends on the opera house plus other factors other than the actual performance. For example, most opera houses have bars and restaurants - so opening and closing would depend on these, which might be used even when an opera is not scheduled.
The only possibility would be the Amazon Theatre (Teatro Amazonas) the opera house is located in the heart of Manaus, inside the Amazon Rainforest in Brazil.
In a taxi it would take 15mins. There are frequent buses from the airport to the city centre where the Grand Opera house is 2min walk from.
It varied from country to country and house to house etc. But usually an opera would run for as long as it 'sold-out' or turned a profit until a new one was ready to take its place. One must also remember that a much higher percentage of compositions would have been 'new', unlike later times.
The Sydney Opera House (in Australia) is classed as a "Wonder of the Modern World" because of it's design, construction, location and it's influence on the culture of Australia.
it would cost 103.83 American dollars.
This would be entirely subjective - based upon a persons likes and dislikes.