Which ancient civilization first established a formal system of royal warrants, where craftsmen could advertise their products as 'Supplier to the Royal Household', creating early brand ambassadors?

Before modern influencers and celebrity endorsements, ancient civilizations had their own version of brand ambassadors. Royal figures, priests, and prominent citizens would endorse particular goods and craftsmen, creating lasting brand value and influencing consumer behavior. This poll explores how ancient cultures utilized influential figures to promote products and services, shaping the commercial landscapes of early marketplaces from Rome to China.

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Ancient Egypt, where Pharaohs granted special seals to preferred artisans around 3100 BCE
Han Dynasty China, where imperial certificates were given to silk producers around 200 BCE
Ancient Rome, where the Senate authorized 'Servitor Imperialis' designations to merchants in 45 BCE
Ancient Persia, where Darius I created the 'Royal Craftsman' title for exclusive suppliers in 500 BCE