Byzantine

Byzantine Coinage
Online exhibition of coinage of this ancient empire. Includes historical and numismatic notes.
http://www.suc.org/culture/history/Byzantine_Coinage/

Byzantine Coins
An important private collection of Byzantine coins with information about references and dealers. A "high-end" collection, with many unique varieties. Features a "Coin-of-the-Month" and "Imitation-of-the-Month".
http://www.byzantinecoins.com