Buildings/City Hall

The City Hall is the central building in the city. Since no building in the city can be higher level than the City Hall itself, it determines the maximum level of all structures. Consequently, it sets the upper limit for research that can be performed (limits level), determines how many troops can fit in hospitals (sets maximum  levels), etc. Upgrading the city hall also increases the number of commanders/traders which may be fielded simultaneously and is the major factor in how many troops a commander may have in their army.

Upgrade Rewards
After each City Hall upgrade, you will receive a mail with some bonus resources and items to claim. Resources come as raw resources, which will transfer directly to your storage, and are not stored in items.