Which ancient civilization invented the first known form of 'product branding' by stamping unique maker's marks on pottery to indicate quality and origin?

Long before modern advertising and digital marketing, ancient civilizations developed sophisticated techniques to promote their products and attract customers. From market stalls in Mesopotamia to trade routes of the Silk Road, merchants used various strategies to stand out from competitors. This poll explores how ancient civilizations approached product marketing and consumer psychology thousands of years ago, revealing that some fundamental principles of commerce have remained unchanged for millennia.

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Ancient Egyptians with their hieroglyphic seals on wine amphorae
Mesopotamians with cylinder seals on clay containers
Ancient Greeks with painted signatures on ceramic vessels
Ancient Romans with embossed marks on glass containers