In ancient Roman markets, which innovative visual merchandising technique was commonly used to display goods and attract customers?

The marketplaces of ancient civilizations were sophisticated centers of commerce with innovative merchandising techniques. From the grand bazaars of Mesopotamia to the agoras of Greece and forums of Rome, visual merchandising played a crucial role in attracting customers and showcasing products. This trivia question explores how ancient merchants displayed their wares in ways that still influence modern retail practices today.

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Tabernae - shop fronts with wide openings and counters facing the street, allowing goods to be prominently displayed to passersby
Holographic projections of products created using reflecting pools and specialized glass arrangements
Underground display rooms illuminated by phosphorescent minerals to highlight luxury goods
Mobile rotating displays powered by water wheels to showcase products in constant motion