Cropland
Cropland produces crops. The production increases when it upgrades. It is the primary way to increase crop production.
Forest
Forest produces lumbers. The production increases when it upgrades. It is the primary way to increase lumber production.
Iron Mine
Iron Mine produces iron. The production increases when it upgrades. It is the primary way to increase iron production.
City Hall
A City Hall does much to maintain law and order. You can accelerate construction speed by upgrading City Hall.
Residence
Residence determines the number of your citizens.
Market
For exchanging and trading resources. The higher level it gets, the more resources you can trade, and the further your caravan can go.
Grain Storage
For storing crops. Expanding grain storage will increase its max capacity.
Lumber Storage
For storing lumber. Expanding Lumber Storage will increase its max capacity.
Iron Storage
For storing iron. Expanding Iron Storage will increase its max capacity.
Barracks
For training troops and building fortifications. The troops are instructed faster when you upgrade your barracks, and you also need the required Barracks level in order to create advanced units.
Watermill
Irrigation maximises the amount of crops the region can produce.
Sawmill
Improve the logging tools and make better use of wood, and the production of lumber will increase.
Foundry
The higher level Foundry gets, the purer the iron is made and the production of iron will increase.
Academy
The technology research center of the city.
Embassy
The first thing you need to do if you want to found an Alliance is to build an Embassy, and then upgrade it up to level 3. And at level 6 you may execute allied denfence and join in an alliance if the leader allows.
Remedy
Recover some troops and defense facilities lost in defensive warfare.
Tavern
Tavern is the place where heroes appear.
Mansion
The level of Mansion determines the number of the cities you may occpucy.
Palace
The symbol of power and strength. Palace increases construction speed greatly.
Reclamation
Every expansion increases the maxium area of the city.
