Louvre and the Hermitage because you have to swap art to fill them. But they still aren't too hard. The Sydney Opera House might be hard too if you've been pumping out Musicians to Tourism Bomb your rivals.
For some unknown reason, I have an insane amount of trouble getting the theming bonuses for The Hermitage and Broadway (the latter primarily because you can't swap Great Works of Music.) The Louvre is, for me, comparatively easy to theme.
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.