Which ancient civilization developed the earliest known form of 'brand recognition' through cylinder seals that merchants used to mark their goods for authenticity?

Before modern retail existed, ancient civilizations had their own sophisticated commercial systems with recognizable 'brands' and trade identities. Merchants used distinctive symbols, seals, and marks to identify their goods and establish reputation. This poll explores how ancient civilizations developed early concepts of brand recognition that would be familiar to modern marketers. Test your knowledge about these fascinating early commercial practices!

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Mesopotamia (particularly ancient Sumer)
Ancient Egypt
Indus Valley Civilization
Ancient China