Which ancient civilization invented the world's first standardized currency system with government-backed coins, revolutionizing retail by replacing barter with a universal medium of exchange?

Long before modern shopping malls and e-commerce, ancient civilizations developed sophisticated commercial systems that laid the groundwork for today's retail practices. From the agoras of Greece to the bazaars of Mesopotamia, these early marketplaces weren't just places of transaction but centers of social and cultural exchange. Test your knowledge about one of history's most influential retail innovations that forever changed how humans conducted commerce.

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Lydians (7th century BCE)
Egyptians (3000 BCE)
Sumerians (4000 BCE)
Romans (300 BCE)