The palais Garnier is a 1979 seat opera house which was built from 1861 to 1875 for the Paris Opera. It’s a beautiful building with lots of details and many beautiful rooms. But what many don’t see is the roof or the backstage. When I was in Paris I found an opportunity to do this infiltration it took me 3 attempts before i got up there. First 2 times I was caught with a security guard with a dog.