Which ancient civilization pioneered the use of 'merchant seals' as a form of brand identification, with unique symbols pressed into clay tablets to guarantee authenticity of goods?

Before modern logos and trademarks, ancient civilizations developed sophisticated branding systems for their products and merchants. From potter's marks in Mesopotamia to guild symbols in ancient Rome, these early branding efforts helped establish reputation, quality, and origin. Test your knowledge about these fascinating early examples of product identification and merchant branding that laid the groundwork for today's global branding practices.

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Mesopotamia (Sumerians)
Ancient Egypt
Indus Valley Civilization
Ancient China (Zhou Dynasty)