I am currently trying for a cultural victory and because of this, always check to see the culture to population ratios on buildings. For the courthouse the ratio is 3:1, so at level 10 the courthouse has 30 population and 10 culture. This kind of surprises me because I feel that a Courthouse is a progressive building that would help a society become more cultured, but this building provides very little in the actual game. This is probably just because of game balancing, but still felt like mentioning this