Which ancient civilization first used standardized pottery stamps as a form of brand logo to indicate the workshop origin and guarantee quality of their exported goods?

Before modern logos and slogans, ancient civilizations had their own methods of product branding and recognition. Merchants needed ways to distinguish their goods and build trust with customers across vast trading networks. This poll explores how ancient civilizations used early forms of corporate identity to stand out in bustling marketplaces from Rome to China.

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Ancient Egypt (using cartouche-style maker's marks)
Ancient Greece (using amphora stamps from specific city-states)
Mesopotamia (using cylinder seals as product authenticity markers)
Ancient China (using imperial workshop chops on porcelain)