Buildings can be placed at construction points in a player's city. There are 16 known Buildings a player can have in their main city, and several more in Satellites. Constructing and upgrading Buildings increases the city's Prosperity. Some buildings come in a fixed spot from the start. As Buildings level up, their effects increase and eventually their appearance will change, too. Many Buildings have specific functions that can be called up by clicking on them. I.e., when clicking on Barracks, soldiers can be recruited.