On another subject, I've always wanted to have a way for cities to gain some tangible benefit from advancing their culture level, other than it passively pushing the culture borders outward.
For example, at
Refined a city could earn a +5% bonus to
, at
Legendary +10%
+5%
+5%
, etc. How could something like that be accomplished; maybe by using python to check each city's culture level & apply a "Building" representing these benefits?