Which ancient civilization first used a standardized royal seal as an official 'logo' on documents and products to authenticate their origin and guarantee their quality?

Before modern corporate logos, ancient civilizations used powerful symbols to represent their identities, values, and authority. These symbols served many of the same functions as today's brand logos—creating recognition, inspiring loyalty, and communicating core values. This poll explores how ancient civilizations used visual branding strategies that still influence modern marketing techniques.

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Ancient Egypt (scarab seals)
Mesopotamia (cylinder seals of Sumer)
Ancient Greece (amphora maker's marks)
Ancient Rome (SPQR symbol)