Which ancient symbol system was specifically designed to mark products for trade and is considered one of the earliest forms of commercial branding?

Before modern logos and corporate identities, ancient civilizations developed sophisticated symbolic systems to represent power, authority, and commerce. From royal cartouches in Egypt to merchant marks on Roman amphorae, these early forms of 'branding' helped establish trust, authority, and recognition. This poll explores how ancient societies developed and utilized distinctive visual elements that served functions remarkably similar to modern corporate logos.

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Egyptian cartouches (oval name-rings of pharaohs)
Mesopotamian cylinder seals used by merchants
Greek pottery signatures by master artisans
Roman imperial eagles stamped on coins