Which ancient civilization invented the first known retail price tags and standardized pricing system for consumer goods?

Before modern shopping malls and e-commerce, ancient civilizations created sophisticated retail environments that shaped commerce for millennia. Their marketplaces weren't just places of trade—they were centers of cultural exchange, technological innovation, and social interaction. Test your knowledge about the revolutionary retail practices that emerged thousands of years ago and continue to influence modern consumer experiences.

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Ancient Rome, where the Forum's merchants implemented the 'pretium justum' (just price) system under Emperor Diocletian's reforms
Mesopotamia, where Babylonian merchants attached clay tablets with cuneiform pricing to goods in the markets of Ur
Ancient Egypt, where papyrus price labels were attached to goods in the markets of Alexandria and Memphis
Ancient China, where silk price tags were first used during the Han Dynasty in the imperial markets