In Civ VI, one thing that came with city unstacking is delineating building lines alongside districts. Thus, we have the Library > University > Research Lab line within the Campus, the Market > Bank > Stock Exchange line within the Commercial Hub, and so on. One special case is the Encampment building line. It surprisingly has four buildings, but two of these are mutually exclusive: the Barracks and the Stable. Both do the same thing (production bonus and added XP for units), but affect different unit lines (melee/ranged and mounted respectively). Being forced to select between two beneficial bonuses is something interesting, and here are some more buildings of this ilk I'm thinking of: * Bank and Guild Hall. The Bank grants a smaller, but more reliable Gold Bonus (+3 GPT), while the Guild Hall ultimately grants a larger bonus, but only if it receives a foreign Trade Route (+2 GPT base, additional +3 GPT if receiving a foreign Trade Route). * Research Lab and Public School. Both provide bonus Science, but the former grants a production bonus towards Spaceports and its associated projects, while the latter also provides Culture and a free Great Work slot. The implication is simple; the former allows you to go for a Science Victory more easily, while the latter helps with a Cultural Victory. So, what other building choices can you suggest?