Byzantine coins were the currency used in the Byzantine Empire, which lasted from the 4th to the 15th century. These coins, primarily made of gold, silver, and copper, were known for their intricate designs and religious imagery, often featuring the Emperor and various saints. The most famous coin was the solidus, a gold coin that became a standard in trade throughout Europe and the Mediterranean. The production of Byzantine coins was centralized, with the mints located in major cities like Constantinople. The coins played a crucial role in the economy, facilitating trade and commerce. Over time, they evolved in design and value, reflecting the empire's political and economic changes.