Ancient currency refers to the various forms of money used by civilizations long ago to facilitate trade and commerce. Instead of coins or paper bills, people often used items like gold, silver, or even shells as currency. These materials were valuable and widely accepted, making it easier for people to exchange goods and services. Different cultures developed their own unique currencies. For example, the Mesopotamians used barley as a form of money, while the Chinese were among the first to create metal coins. Over time, these early currencies laid the groundwork for the complex financial systems we use today.