Which ancient civilization is credited with creating the earliest known system of commercial 'logos' using cylinder seals to mark ownership of traded goods?

Before modern corporate logos, ancient civilizations developed sophisticated systems of symbols and marks to identify goods, indicate ownership, and establish authenticity. From potter's marks in Mesopotamia to merchant symbols in ancient Rome, these early forms of branding served many of the same purposes as today's logos. Test your knowledge about these fascinating early commercial identifiers that influenced modern brand design principles.

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Mesopotamia (Sumerians)
Ancient Egypt
Indus Valley Civilization
Ancient China