Is it possible to see the inside of the National Theater without seeing a performance? Are there tours, or can you visit during certain hours? I don't mind going to see a performance - I just want to be sure to bring proper clothes!
I don't know if you can do a non-event visit, it's not listed as an option in the RS book or the website (www.nationaltheatre.cz). Personally, I loved the behind the scenes tour at the Municipal House - amazing art deco interior and worth every penny to see the non-public spaces (plus a drink in their little bar at the end of the tour).