Which ancient civilization created the world's first known retail brand ambassador program where royal figures would publicly endorse specific merchants' products to boost sales?

Before modern malls and e-commerce, ancient civilizations developed sophisticated marketplaces and brand recognition systems that would influence commerce for millennia. From royal endorsements to specialized shopping districts, the foundations of modern retail marketing were established thousands of years ago. Test your knowledge about how ancient merchants promoted their products and built their commercial empires!

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Ancient Egypt, where Pharaohs would ceremonially use and promote specific luxury goods, giving merchants the right to display royal seals
Ancient Rome, where emperors would grant official patronage to craftsmen, allowing them to stamp 'Imperator Probavit' (Emperor Approved) on their goods
Ancient China, where the Han Dynasty established an imperial certification system for merchants who could then mark products as 'Heaven Blessed'
Ancient Greece, where Olympic victors would receive sponsorship contracts from artisans to publicly use and promote their crafted items