Instructions
Identify the style of coin. Two of the most common Byzantine coins are folles coins from the early days of the Byzantine Empire and scyphate or cup-shaped coins.
Date the coin by identifying the emperor on it. The approximate date of the coin's production can be narrowed down by identifying it with the emperor it depicts. The Byzantine Empire had more than 80 emperors.
Determine the mint where the coin was produced. Because the empire was vast and it was costly and dangerous to move large numbers of coins, coins were produced in several mints. The mint is usually noted on the coin as a three-letter abbreviation, such as "CON." Many gold coins include the mint mark "CONOB," with "CON" standing for the mint at Constantinople and "OB" to indicate the coin is pure gold.