Money descriptions (GOT)

The Seven Kingdoms

 * Uses coins. From most to least value: golden dragons, silver stags, copper stars, pennies, half-pennies, groats.
 * Everything is overseen by the Master of Coin.
 * Money bears the face of the king who minted it.
 * Copper stars have the seven-pointed star of the Seven Gods.

Essos

 * 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.