Which of these ancient symbols is considered the oldest continuously used logo-like emblem still in active use today?

Before modern corporate identities, ancient civilizations created powerful symbols that functioned much like today's logos. Some of these symbols have influenced modern branding techniques and have remarkable staying power. This poll tests your knowledge about the oldest continuously used logo or symbol that originated in the ancient world and is still recognizable today.

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The Rod of Asclepius (snake-entwined staff), used by medical organizations since Ancient Greece (circa 800 BCE)
The Roman SPQR emblem (Senatus Populusque Romanus), used by the city of Rome since Ancient Roman times (circa 100 BCE)
The Fleur-de-lis symbol, used continuously since Ancient Egypt as adapted by French monarchy (circa 500 BCE)
The Endless Knot symbol from Ancient Mesopotamia, adopted by various religious organizations (circa 700 BCE)