The Nine Free Cities each have their own banks. Lyseni coins are oval shaped with a naked woman on them. Volantis has honors, which are smaller than pennies with a crown on one side and a skull on the other.
The Iron Bank of Braavos is the most powerful and wealthy. Braavosi coins are square and iron.
Astapor, Yunkai, and Meereen each have their own currency. Astapor uses silver marks, Yunkai uses gold marks with a stepped pyramid on one side and the Harpy of Ghis on the other. Meereen's coins include honors.