Which ancient commercial symbol is considered the world's oldest documented 'logo' still in continuous use today?

Long before modern logos and branding strategies, ancient civilizations created symbols to mark their goods and establish commercial identity. These early 'brands' helped distinguish products in ancient marketplaces from Mesopotamia to Rome. Some symbols were so effective they influenced trade across vast regions and multiple civilizations. Test your knowledge about the fascinating intersection of ancient commerce and early brand development!

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Stella Artois brewery's horn symbol (Belgium, 1366 CE)
The Sulwhasoo herbal medicine symbol (Korea, 897 CE)
The Hōshi Ryokan's hot spring symbol (Japan, 718 CE)
The Venetian Murano Glass Guild mark (Italy, 982 CE)