RealMoneyResources

Gold Buildings
In game of war, there are certain buildings that require gold. Using the gold, you can buy an item in order to be upgrade the building. These buildings are: the Altar, Hall of War, and the prison.

Prison - Iron Shackle

Hall of war - Book of War

Altar - Sacrifical Dagger

Price
Each item (Shackle, Book of War, and Dagger) costs the same. As you can see, buying in bulk makes them cheaper.