Assuming you already know about Coinage, you can then initiate banking. While individual units are unable to own their own property, banking improves resource exchanges between nations (known as tributes). In fact, it eliminates all fees associated with tributing.
Technology Statistics[edit | edit source]
Available to: All (requires Coinage)
Researched at: Market
Cost: 200 Food, 100 Florins
Effect: Tribute fee eliminated.