Which ancient civilization developed the first known organized retail space with standardized pricing and a proto-currency system for trading goods?

Before modern shopping malls and e-commerce platforms, ancient civilizations created sophisticated marketplaces and trading systems. These early retail innovations shaped economic development and cultural exchange for thousands of years. This poll explores how ancient societies approached retail strategies and commercial innovations that continue to influence modern business practices today.

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Mesopotamia (Sumerians), with their temple complexes serving as centralized marketplaces around 3500 BCE
Ancient Egypt, with their royal bazaars along the Nile using grain-based currency around 3000 BCE
Indus Valley Civilization, with their grid-planned market streets and weight-based trading system around 2600 BCE
Ancient China during the Shang Dynasty, with designated merchant quarters using cowrie shells as currency around 1600 BCE