I can't figure out how to make Great Works - Product : r/civ6
Tundra Required Buildings: Library Building Yield Changes: Science: +2 Great Works Slots: Writing: 2 Great Person Points: Scientist: 1.
Unique buildings | Stellaris Wiki
With the max building slots of 6, only six building can be built in total.
Modifiers | Modding Cooperative Hoi4 Wiki | Fandom
As your nation expands, you may need to switch or replace buildings to maximize building slots. Population growth is another factor to consider, as higher population allows for more building slots and economic growth.
16 Building Slots - Skymods
Read more about 16 Building Slots at Buildings, Economy, Overhaul on Skymods.