Trying this again...
I'm thinking of a skyscraper.
Remember you're no longer asking questions, you're directly guessing which skyscraper I'm thinking about.
(The Emporis Standards Committee defines Skyscrapers as 100m (330 ft) or higher, so we're clear.)
Rules:
You have 11 guesses (in total...
Actually, the only thing that wasn't stolen at the Louvre's Apollo Gallery is the Regent Diamond, figure no one would take it because something to do with a curse.