Which ancient civilization pioneered an early form of 'omnichannel retail' by establishing standardized marketplace designs across their territory with consistent pricing and merchant licensing?

Before modern shopping malls and e-commerce, ancient civilizations developed sophisticated retail strategies that shaped commerce for millennia. From the agoras of Greece to the forums of Rome and the bazaars of Mesopotamia, these early marketplaces pioneered concepts we still use today. This trivia explores how ancient civilizations approached what we now call 'omnichannel retail' - connecting different trading environments to create seamless commercial experiences across their empires.

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Roman Empire, with their forum-based commercial networks that maintained identical layouts and regulations across provinces
Ancient Egypt, with their seasonal market festivals that traveled along the Nile connecting rural and urban shopping experiences
Phoenicians, with their port-based trading hubs that functioned as independent franchises with local customization
Ancient China, with their silk road caravanserais that functioned as branded outposts with imperial quality guarantees