Which ancient civilization first developed specialized retail districts with shops organized by product category, creating an early form of department store layout?

Before modern shopping malls and e-commerce, ancient civilizations developed sophisticated retail systems that would influence commerce for millennia. From the agoras of Greece to the forums of Rome and the bazaars of Mesopotamia, these early retail innovations shaped how people bought, sold, and marketed goods. Test your knowledge of these ancient retail practices that laid the foundation for today's consumer experience!

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The Roman Empire with their multi-story shopping complexes called 'Mercatus'
Ancient Egypt with their 'Per-Aa' marketplace districts along the Nile
The Indus Valley Civilization with their grid-patterned 'Vanij' markets
Ancient China during the Zhou Dynasty with their 'Shi' commercial quarters