Buildings are important entities in Age of Empires III that provide crucial abilities such as training units, researching technologies, or defending areas. All buildings in Age of Empires III are shown in the following list, sorted by the Age in which they can first be built.
Trading Post: Can only be built on a native settlement or trade route. If built on a settlement, you can train native warriors and access their improvements. If built on a Trade Route, it will routinely give exp. and when upgraded, resources.