Which ancient civilization first used a standardized symbol system that functioned similar to modern logos, with consistent imagery stamped on products to indicate their origin and quality?

Before modern corporate logos, ancient civilizations developed sophisticated visual identity systems. From the royal seals of Mesopotamia to the emblems of Roman legions, these early 'logos' served many of the same functions as their modern counterparts: establishing authority, communicating identity, and building recognition. This poll explores how ancient civilizations pioneered what we now consider fundamental principles of brand identity and logo design.

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Mesopotamia (c. 3500 BCE), with cylinder seals used by merchants to mark ownership and authenticity of goods
Ancient Egypt (c. 3100 BCE), with cartouches used exclusively by pharaohs as royal signatures
Ancient Greece (c. 800 BCE), with city-state emblems stamped on coins and pottery
Roman Empire (c. 100 CE), with SPQR and legion standards as the first systematic visual identity system